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https://issues.apache.org/jira/browse/SOLR-8129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14972773#comment-14972773
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Mark Miller commented on SOLR-8129:
-----------------------------------
Actually, it appears to just be really bad luck for the monkey. The fail is
reproducible, but it's actually with numSlices = 2 and numShards = 3.
I was seeing:
{noformat}
[junit4] 2> 55703 INFO (Thread-219) [ ] o.a.s.c.ChaosMonkey monkey:
only one active node in shard - monkey cannot kill :(
[junit4] 2> 57863 INFO (Thread-219) [ ] o.a.s.c.ChaosMonkey monkey:
only one active node in shard - monkey cannot kill :(
[junit4] 2> 63113 INFO (Thread-219) [ ] o.a.s.c.ChaosMonkey monkey:
only one active node in shard - monkey cannot kill :(
[junit4] 2> 69451 INFO (Thread-219) [ ] o.a.s.c.ChaosMonkey monkey:
only one active node in shard - monkey cannot kill :(
[junit4] 2> 78330 INFO (Thread-219) [ ] o.a.s.c.ChaosMonkey monkey:
only one active node in shard - monkey cannot kill :(
{noformat}
But apparently it just keeps randomly picking the shard with only a single
replica in it. With the same numShards and slices and a different seed, the
test passes.
> HdfsChaosMonkeyNothingIsSafeTest failures
> -----------------------------------------
>
> Key: SOLR-8129
> URL: https://issues.apache.org/jira/browse/SOLR-8129
> Project: Solr
> Issue Type: Bug
> Reporter: Yonik Seeley
> Attachments: fail.151005_064958, fail.151005_080319
>
>
> New HDFS chaos test in SOLR-8123 hits a number of types of failures,
> including shard inconsistency.
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