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https://issues.apache.org/jira/browse/SOLR-13694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16906494#comment-16906494
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Andrzej Bialecki commented on SOLR-13694:
------------------------------------------
Indeed, it's a bug in {{IndexSizeEstimator}} - the {{StoredFieldsReader}} is
not supposed to be closed other than from within CodecReader.close(). I'll fix
it in a moment.
> IndexSizeEstimator NullPointerException
> ---------------------------------------
>
> Key: SOLR-13694
> URL: https://issues.apache.org/jira/browse/SOLR-13694
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Hoss Man
> Assignee: Andrzej Bialecki
> Priority: Major
>
> Jenkins found a reproducible seed for trigging an NPE in
> IndexSizeEstimatorTest
> Based on a little experimental tracing i did, this might be a real bug in
> IndexSizeEstimator? ... it's calling close on StoredFieldsReader instances it
> gets from the CodecReader -- but AFAICT from the docs/code i'm not certain if
> it should be doing this. It appears the expectation is that this is direct
> access to the internal state, that will automatically be closed when the
> CodecReader is closed.
> ie: IndexSizeEstimator is closing StoredFieldsReader pre-maturely, causing it
> to be unusbale on the next iteration.
> (I didn't dig in far enough to guess if there are other places in the
> IndexSizeEstimator code that are closing CodecReader internals prematurely as
> well, or just in this situation ... it's also not clear if this only causes
> failures because this seed uses SimpleTextCodec, and other codecs are more
> forgiving -- or if something else about the index(es) generated for this seed
> are what cause the problem to manifest)
> http://fucit.org/solr-jenkins-reports/job-data/apache/Lucene-Solr-NightlyTests-master/1928
> {noformat}
> hossman@tray:~/lucene/dev/solr/core [j11] [master] $ git rev-parse HEAD
> 0291db44bc8e092f7cb2f577f0ac8ab6fa6a5fd7
> hossman@tray:~/lucene/dev/solr/core [j11] [master] $ ant test
> -Dtestcase=IndexSizeEstimatorTest -Dtests.method=testEstimator
> -Dtests.seed=23F60434E13D8FD4 -Dtests.multiplier=2 -Dtests.nightly=true
> -Dtests.slow=true -Dtests.locale=eo -Dtests.timezone=Atlantic/Madeira
> -Dtests.asserts=true -Dtests.file.encoding=UTF-8
> ...
> [junit4] 2> NOTE: reproduce with: ant test
> -Dtestcase=IndexSizeEstimatorTest -Dtests.method=testEstimator
> -Dtests.seed=23F60434E13D8FD4 -Dtests.multiplier=2 -Dtests.nightly=true
> -Dtests.slow=true -Dtests.badapples=true -Dtests.locale=eo
> -Dtests.timezone=Atlantic/Madeira -Dtests.asserts=true
> -Dtests.file.encoding=UTF-8
> [junit4] ERROR 0.88s | IndexSizeEstimatorTest.testEstimator <<<
> [junit4] > Throwable #1: java.lang.NullPointerException
> [junit4] > at
> __randomizedtesting.SeedInfo.seed([23F60434E13D8FD4:EC2B6B666D451E64]:0)
> [junit4] > at
> org.apache.lucene.codecs.simpletext.SimpleTextStoredFieldsReader.visitDocument(SimpleTextStoredFieldsReader.java:109)
> [junit4] > at
> org.apache.solr.handler.admin.IndexSizeEstimator.estimateStoredFields(IndexSizeEstimator.java:513)
> [junit4] > at
> org.apache.solr.handler.admin.IndexSizeEstimator.estimate(IndexSizeEstimator.java:198)
> [junit4] > at
> org.apache.solr.handler.admin.IndexSizeEstimatorTest.testEstimator(IndexSizeEstimatorTest.java:117)
> [junit4] > at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> [junit4] > at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> [junit4] > at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> [junit4] > at
> java.base/java.lang.reflect.Method.invoke(Method.java:566)
> [junit4] > at java.base/java.lang.Thread.run(Thread.java:834)
> {noformat}
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