Error when connecting to server without SSL #234

Closed
Closed
Error when connecting to server without SSL#234

Description

@sschlenkrich
sschlenkrich
opened on Mar 14, 2026

Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:

ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.

My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.

Below is a MWE for the error. I use dolt to setup a DB server.

Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?

Navigate to a folder and initialise an empty database repository.

dolt init

Start the database server.

dolt sql-server

This yields the following info messages:

Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

Start Julia with an empty project and add MySQL. This yields

 Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

The error occurs when running the following commands:

julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:

julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
       blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

      Skip to content
      Error when connecting to server without SSL #234
      Closed
      Closed
      Error when connecting to server without SSL#234
      Description
      @sschlenkrich
      sschlenkrich
      opened on Mar 14, 2026
      Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
      ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

      Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
      My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
      Below is a MWE for the error. I use dolt to setup a DB server.
      Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
      Navigate to a folder and initialise an empty database repository.
      dolt init

      Start the database server.
      dolt sql-server

      This yields the following info messages:
      Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

      Start Julia with an empty project and add MySQL. This yields
       Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

      The error occurs when running the following commands:
      julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

      Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
      julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        No labels
        No labels
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

          Skip to content
          Error when connecting to server without SSL #234
          Closed
          Closed
          Error when connecting to server without SSL#234
          Description
          @sschlenkrich
          sschlenkrich
          opened on Mar 14, 2026
          Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
          ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

          Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
          My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
          Below is a MWE for the error. I use dolt to setup a DB server.
          Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
          Navigate to a folder and initialise an empty database repository.
          dolt init

          Start the database server.
          dolt sql-server

          This yields the following info messages:
          Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

          Start Julia with an empty project and add MySQL. This yields
           Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

          The error occurs when running the following commands:
          julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

          Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
          julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              Error when connecting to server without SSL #234
              Closed
              Closed
              Error when connecting to server without SSL#234
              Description
              @sschlenkrich
              sschlenkrich
              opened on Mar 14, 2026
              Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
              ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

              Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
              My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
              Below is a MWE for the error. I use dolt to setup a DB server.
              Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
              Navigate to a folder and initialise an empty database repository.
              dolt init

              Start the database server.
              dolt sql-server

              This yields the following info messages:
              Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

              Start Julia with an empty project and add MySQL. This yields
               Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

              The error occurs when running the following commands:
              julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

              Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
              julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                No labels
                No labels
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

                  Skip to content
                  Error when connecting to server without SSL #234
                  Closed
                  Closed
                  Error when connecting to server without SSL#234
                  Description
                  @sschlenkrich
                  sschlenkrich
                  opened on Mar 14, 2026
                  Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
                  ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

                  Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
                  My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
                  Below is a MWE for the error. I use dolt to setup a DB server.
                  Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
                  Navigate to a folder and initialise an empty database repository.
                  dolt init

                  Start the database server.
                  dolt sql-server

                  This yields the following info messages:
                  Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

                  Start Julia with an empty project and add MySQL. This yields
                   Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

                  The error occurs when running the following commands:
                  julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

                  Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
                  julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      Error when connecting to server without SSL #234
                      Closed
                      Closed
                      Error when connecting to server without SSL#234
                      Description
                      @sschlenkrich
                      sschlenkrich
                      opened on Mar 14, 2026
                      Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
                      ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

                      Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
                      My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
                      Below is a MWE for the error. I use dolt to setup a DB server.
                      Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
                      Navigate to a folder and initialise an empty database repository.
                      dolt init

                      Start the database server.
                      dolt sql-server

                      This yields the following info messages:
                      Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

                      Start Julia with an empty project and add MySQL. This yields
                       Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

                      The error occurs when running the following commands:
                      julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

                      Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
                      julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        No labels
                        No labels
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                          Skip to content
                          Error when connecting to server without SSL #234
                          Closed
                          Closed
                          Error when connecting to server without SSL#234
                          Description
                          @sschlenkrich
                          sschlenkrich
                          opened on Mar 14, 2026
                          Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
                          ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

                          Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
                          My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
                          Below is a MWE for the error. I use dolt to setup a DB server.
                          Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
                          Navigate to a folder and initialise an empty database repository.
                          dolt init

                          Start the database server.
                          dolt sql-server

                          This yields the following info messages:
                          Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

                          Start Julia with an empty project and add MySQL. This yields
                           Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

                          The error occurs when running the following commands:
                          julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

                          Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
                          julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                              Skip to content
                              Error when connecting to server without SSL #234
                              Closed
                              Closed
                              Error when connecting to server without SSL#234
                              Description
                              @sschlenkrich
                              sschlenkrich
                              opened on Mar 14, 2026
                              Hi, I encontered the following error with MySQL.jl v1.5.1 and MariaDB_Connector_C_jll v3.4.8+0:
                              ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it

                              Unfortunately, using option ssl_mode = MySQL.API.SSL_MODE_DISABLED did not resolve the issue.
                              My understanding is, the error is related to the MariaDB_Connector_C_jll package. Enforcing an earlier version (e.g. v3.3.9) of MariaDB_Connector_C_jll works around the error. But my understanding is, that MySQL.jl should also work with newer versions of MariaDB_Connector_C_jll.
                              Below is a MWE for the error. I use dolt to setup a DB server.
                              Could it be that the option ssl_mode = MySQL.API.SSL_MODE_DISABLED is not enough to disable the client requirements for SSL encryption?
                              Navigate to a folder and initialise an empty database repository.
                              dolt init

                              Start the database server.
                              dolt sql-server

                              This yields the following info messages:
                              Starting server with Config HP="localhost:3306"|T="28800000"|R="false"|L="info"
...

                              Start Julia with an empty project and add MySQL. This yields
                               Resolving package versions...
Updating `...\MySQL_Issue\Project.toml`
[39abe10b] + MySQL v1.5.1
Updating `...\MySQL_Issue\Manifest.toml`
...
[39abe10b] + MySQL v1.5.1
...
[aabc7e14] + MariaDB_Connector_C_jll v3.4.8+0
...

                              The error occurs when running the following commands:
                              julia> using MySQL
julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
ERROR: (2026): TLS/SSL error: SSL is required, but the server does not support it
Stacktrace:
[1] @ MySQL.API C:\Users\sebas\.julia\packages\MySQL\JGiss\src\api\capi.jl:12
[2] MySQL.Connection(host::String, user::String, passwd::String, db::String, port::Int64, unix_socket::String; kw::@Kwargs{})
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:36
[3] Connection
@ C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:26 [inlined]
[4] connect(::Type{MySQL.Connection}, host::String, user::String, passwd::String)
@ MySQL C:\Users\sebas\.julia\packages\MySQL\JGiss\src\MySQL.jl:294
[5] top-level scope
@ REPL[3]:1
Some type information was truncated. Use `show(err)` to see complete types.

                              Workaround: Adding MariaDB_Connector_C_jll explicitly with a compat entry MariaDB_Connector_C_jll = "~3.3" resolves the error:
                              julia> DBInterface.connect(MySQL.Connection, "localhost", "root", "")
MySQL.Connection(host="localhost", user="root", port="3306", db="")

                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions