Major Description
My Jenkins found a seed http://jenkins.sarowe.net/job/Lucene-Solr-Nightly-5.x-Java8/16 that reproduces for me about 5% of the time via beasting:
[junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestIndexWriterOutOfFileDescriptors -Dtests.method=test -Dtests.seed=AE5CB745082C8FEA -Dtests.multiplier=2 -Dtests.nightly=true -Dtests.slow=true -Dtests.linedocsfile=/home/jenkins/lucene-data/enwiki.random.lines.txt -Dtests.locale=tr -Dtests.timezone=Europe/Copenhagen -Dtests.asserts=true -Dtests.file.encoding=ISO-8859-1 [junit4] ERROR 0.74s J6 | TestIndexWriterOutOfFileDescriptors.test <<< [junit4] > Throwable #1: java.lang.IllegalStateException: this writer hit an unrecoverable error; cannot commit [junit4] > at __randomizedtesting.SeedInfo.seed([AE5CB745082C8FEA:2608889FA6D0E212]:0) [junit4] > at org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2775) [junit4] > at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2961) [junit4] > at org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1080) [junit4] > at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1123) [junit4] > at org.apache.lucene.index.TestIndexWriterOutOfFileDescriptors.test(TestIndexWriterOutOfFileDescriptors.java:87) [junit4] > at java.lang.Thread.run(Thread.java:745) [junit4] > Caused by: java.io.FileNotFoundException: a random IOException (_c.cfs) [junit4] > at org.apache.lucene.store.MockDirectoryWrapper.maybeThrowIOExceptionOnOpen(MockDirectoryWrapper.java:458) [junit4] > at org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:635) [junit4] > at org.apache.lucene.codecs.lucene50.Lucene50CompoundReader.<init>(Lucene50CompoundReader.java:71) [junit4] > at org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.getCompoundReader(Lucene50CompoundFormat.java:71) [junit4] > at org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:93) [junit4] > at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:65) [junit4] > at org.apache.lucene.index.ReadersAndUpdates.getReader(ReadersAndUpdates.java:145) [junit4] > at org.apache.lucene.index.ReadersAndUpdates.getReaderForMerge(ReadersAndUpdates.java:617) [junit4] > at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4001) [junit4] > at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3648) [junit4] > at org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:588) [junit4] > at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:626) [junit4] 2> NOTE: leaving temporary files on disk at: /var/lib/jenkins/jobs/Lucene-Solr-Nightly-5.x-Java8/workspace/lucene/build/core/test/J6/temp/lucene.index.TestIndexWriterOutOfFileDescriptors_AE5CB745082C8FEA-001 [junit4] 2> NOTE: test params are: codec=Lucene53, sim=DefaultSimilarity, locale=tr, timezone=Europe/Copenhagen [junit4] 2> NOTE: Linux 4.1.0-custom2-amd64 amd64/Oracle Corporation 1.8.0_45 (64-bit)/cpus=16,threads=1,free=311559920,total=328728576