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fix some alerts raised by LGTM - #474

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fix some alerts raised by LGTM#474
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malcolmtaylor:fix-lgtm-alerts

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LGTM has raised some alerts after analysing Hadoop (https://lgtm.com/projects/g/apache/hadoop/alerts/?mode=tree).
This pull request is to fix some of the more straightforward ones. Specifically,

  • ArrayIndexOutOfBounds in KerberosName
  • Contradictory type checks in GenericExceptionHandler
    -Missing format argument in RegistrySecurity, HttpFSExceptionProvider, DatasetVolumeChecker and ServiceClient

(disclosure: I work for Semmle, the company behind LGTM).

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_ trunk Compile Tests _
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7149
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0reexec69Docker mode activated.
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ReasonTests
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0reexec35Docker mode activated.
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Hi @1m2c3t4
Would you create an issue in ASF JIRA before creating a pull request?
Contributor guide: https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute

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@aajisaka I have now created HADOOP-16556. I'll close this PR and replace it with #1428

shanthoosh added a commit to shanthoosh/hadoop that referenced this pull request Oct 15, 2019
…eams.
Currently successive invocation of EventHubSystemAdmin.getSystemStreamMetadata with the same stream collection returns empty results.
This is an implementation bug, where the streams requested as a part of prior invocations of EventHubSystemAdmin.getSystemStreamMetadata are ignored(due to stale caching).
This bug causes the JobModel generation phase to fail and kills the StreamProcessor.
Author: Shanthoosh Venkataraman <svenkataraman@linkedin.com>
Reviewers: Jagadish <jagadish@apache.org>, Srini P<spunuru@linkedin.com>
Closesapache#474 from shanthoosh/EventHubSystemAdminBug
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@malcolmtaylor@hadoop-yetus@aajisaka