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https://issues.apache.org/jira/browse/SOLR-6640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14186676#comment-14186676
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Shalin Shekhar Mangar commented on SOLR-6640:
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Thanks Robert. In order to make sure that we are actually downloading files
belonging to the correct segment, we need access to the segment version but it
doesn't seem like there's an easy way to read them? Can the segment ids be
exposed in the IndexCommit object? Also, can we provide a custom segment id
instead of having Lucene generate them? As it stands today, we have no way of
controlling the segment ids generated by replicas and therefore I'm afraid that
replica recovery might end up downloading the complete index.
> ChaosMonkeySafeLeaderTest failure with CorruptIndexException
> ------------------------------------------------------------
>
> Key: SOLR-6640
> URL: https://issues.apache.org/jira/browse/SOLR-6640
> Project: Solr
> Issue Type: Bug
> Components: replication (java)
> Affects Versions: 5.0
> Reporter: Shalin Shekhar Mangar
> Fix For: 5.0
>
> Attachments: Lucene-Solr-5.x-Linux-64bit-jdk1.8.0_20-Build-11333.txt
>
>
> Test failure found on jenkins:
> http://jenkins.thetaphi.de/job/Lucene-Solr-5.x-Linux/11333/
> {code}
> 1 tests failed.
> REGRESSION: org.apache.solr.cloud.ChaosMonkeySafeLeaderTest.testDistribSearch
> Error Message:
> shard2 is not consistent. Got 62 from
> http://127.0.0.1:57436/collection1lastClient and got 24 from
> http://127.0.0.1:53065/collection1
> Stack Trace:
> java.lang.AssertionError: shard2 is not consistent. Got 62 from
> http://127.0.0.1:57436/collection1lastClient and got 24 from
> http://127.0.0.1:53065/collection1
> at
> __randomizedtesting.SeedInfo.seed([F4B371D421E391CD:7555FFCC56BCF1F1]:0)
> at org.junit.Assert.fail(Assert.java:93)
> at
> org.apache.solr.cloud.AbstractFullDistribZkTestBase.checkShardConsistency(AbstractFullDistribZkTestBase.java:1255)
> at
> org.apache.solr.cloud.AbstractFullDistribZkTestBase.checkShardConsistency(AbstractFullDistribZkTestBase.java:1234)
> at
> org.apache.solr.cloud.ChaosMonkeySafeLeaderTest.doTest(ChaosMonkeySafeLeaderTest.java:162)
> at
> org.apache.solr.BaseDistributedSearchTestCase.testDistribSearch(BaseDistributedSearchTestCase.java:869)
> {code}
> Cause of inconsistency is:
> {code}
> Caused by: org.apache.lucene.index.CorruptIndexException: file mismatch,
> expected segment id=yhq3vokoe1den2av9jbd3yp8, got=yhq3vokoe1den2av9jbd3yp7
> (resource=BufferedChecksumIndexInput(MMapIndexInput(path="/mnt/ssd/jenkins/workspace/Lucene-Solr-5.x-Linux/solr/build/solr-core/test/J0/temp/solr.cloud.ChaosMonkeySafeLeaderTest-F4B371D421E391CD-001/tempDir-001/jetty3/index/_1_2.liv")))
> [junit4] 2> at
> org.apache.lucene.codecs.CodecUtil.checkSegmentHeader(CodecUtil.java:259)
> [junit4] 2> at
> org.apache.lucene.codecs.lucene50.Lucene50LiveDocsFormat.readLiveDocs(Lucene50LiveDocsFormat.java:88)
> [junit4] 2> at
> org.apache.lucene.codecs.asserting.AssertingLiveDocsFormat.readLiveDocs(AssertingLiveDocsFormat.java:64)
> [junit4] 2> at
> org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:102)
> {code}
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