[SPARK-29290][CORE] Update to chill 0.9.5

[srowen]

What changes were proposed in this pull request?

Update Twitter Chill to 0.9.5.

Why are the changes needed?

Primarily, Scala 2.13 support for later.
Other changes from 0.9.3 are apparently just minor fixes and improvements:
https://github.com/twitter/chill/releases

Does this PR introduce any user-facing change?

No

How was this patch tested?

Existing tests

[SparkQA]

Test build #116813 has finished for PR 27227 at commit 89e2af4.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #116811 has finished for PR 27227 at commit dbc819a.

• This patch passes all tests.
• This patch does not merge cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

Retest this please.

[SparkQA]

Test build #116879 has finished for PR 27227 at commit 89e2af4.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

The patch itself looks good to me, @srowen . The library is published yesterday and it seems that Google Maven Central needs more time to pick up that. Shall we wait for one or two days?

[ERROR] Failed to execute goal on project spark-unsafe_2.12:
Could not resolve dependencies for project org.apache.spark:spark-unsafe_2.12:jar:3.0.0-SNAPSHOT: Could not find artifact com.twitter:chill_2.12:jar:0.9.5 in google-maven-central (https://maven-central.storage-download.googleapis.com/repos/central/data/) -> [Help 1]

[srowen]

Jenkins, retest this please

[SparkQA]

Test build #116978 has finished for PR 27227 at commit 89e2af4.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[srowen]

@dongjoon-hyun yeah I noticed this locally when using the Google mirror. Hm, I'm not sure how frequently they sync; this could become an issue. This isn't urgent so I'll sit on it a while, but after a week or so maybe we have to merge and then disable the mirror

[dongjoon-hyun]

@srowen . If we disable the mirror, Maven Central will cause a flaky failure in GitHub Action. I'm also searching a nice way to avoid this sync issue. For now, there was no luck to me.

[dongjoon-hyun]

BTW, Maven Central also looks weird to me. Technically, we can access https://repo1.maven.org/maven2/com/twitter/chill_2.12/0.9.5/ correctly, but the listing doesn't show it.

However, the maven-metadata.xml is correct.

[srowen]

For the latter, try refreshing. I do see it and can see https://repo1.maven.org/maven2/com/twitter/chill_2.12/0.9.5/

[dongjoon-hyun]

No. What I mean is https://repo1.maven.org/maven2/com/twitter/chill_2.12/.

[dongjoon-hyun]

You can not see 0.9.5 in the upper directory. (I've been using Private Browsing mode always to check this location). Only maven-metadata.xml is correct.

[srowen]

I do see 0.9.5 in the parent directory:

[dongjoon-hyun]

Oh, that's weird. I'm using both Chrome (Incognito) and Safari (Private) mode, but I cannot see it still (as of now). Is this regional ISP (Internet Service Provider) issue? Hmm.

[dongjoon-hyun]

The following is curl result.

$ curl https://repo1.maven.org/maven2/com/twitter/chill_2.12/ | grep 0.9
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 2255 100 2255 0 0 15445 0 --:--:-- --:--:-- --:--:-- 15445
<a href="0.9.0/" title="0.9.0/">0.9.0/</a> 2017-01-03 19:41 -
<a href="0.9.1/" title="0.9.1/">0.9.1/</a> 2017-01-09 18:24 -
<a href="0.9.2/" title="0.9.2/">0.9.2/</a> 2017-02-23 19:16 -
<a href="0.9.3/" title="0.9.3/">0.9.3/</a> 2018-08-11 21:55 -
<a href="0.9.4/" title="0.9.4/">0.9.4/</a> 2019-11-19 02:09 -
<a href="maven-metadata.xml" title="maven-metadata.xml">maven-metadata.xml</a> 2019-11-19 02:15 669
<a href="maven-metadata.xml.md5" title="maven-metadata.xml.md5">maven-metadata.xml.md5</a> 2019-11-19 02:15 32
<a href="maven-metadata.xml.sha1" title="maven-metadata.xml.sha1">maven-metadata.xml.sha1</a> 2019-11-19 02:15 40

[srowen]

Weird, I curl'ed it too and do see 0.9.5. We may indeed be hitting different instances of the central repo. That is itself a bit troublesome if not all of even central has the artifact

[dongjoon-hyun]

Hi, @srowen . I found a solution for this. Could you review this?

• [SPARK-30572][BUILD] Add a fallback Maven repository #27281

[dongjoon-hyun]

+1, LGTM. Merged to master.
Thank you for waiting, @srowen .