mikemccand commented on pull request #1623:
URL: https://github.com/apache/lucene-solr/pull/1623#issuecomment-651166475
Here's a fun tragic failure test that repros:
```
[junit4] 2> NOTE: reproduce with: ant test
-Dtestcase=TestIndexWriterOnVMError -Dtests.method=testUnknownError
-Dtests.seed=BBEAF0EBC40AB8F7 -Dtests.slow=true -Dtests.badapples=true \
-Dtests.locale=brx -Dtests.timezone=Indian/Chagos -Dtests.asserts=true
-Dtests.file.encoding=UTF-8
[junit4] FAILURE 0.30s | TestIndexWriterOnVMError.testUnknownError <<<
[junit4] > Throwable #1: java.lang.AssertionError
[junit4] > at
__randomizedtesting.SeedInfo.seed([BBEAF0EBC40AB8F7:50BC2F6BC68D2EC7]:0)
[junit4] > at
org.apache.lucene.index.IndexWriter.maybeCloseOnTragicEvent(IndexWriter.java:5026)
[junit4] > at
org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:5019)
[junit4] > at
org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4214)
[junit4] > at
org.apache.lucene.index.IndexWriter$IndexWriterMergeSource.merge(IndexWriter.java:5735)
[junit4] > at
org.apache.lucene.index.SerialMergeScheduler.merge(SerialMergeScheduler.java:40)
[junit4] > at
org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:581)
[junit4] > at
org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:103)
[junit4] > at
org.apache.lucene.index.TestIndexWriterOnVMError.doTest(TestIndexWriterOnVMError.java:175)
[junit4] > at
org.apache.lucene.index.TestIndexWriterOnVMError.testUnknownError(TestIndexWriterOnVMError.java:251)
[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)
[junit4] 2> NOTE: test params are: codec=Asserting(Lucene86):
{text_payloads=PostingsFormat(name=Direct),
text_vectors=TestBloomFilteredLucenePostings(BloomFilteringPostingsFormat(Luc\
ene84)),
text1=TestBloomFilteredLucenePostings(BloomFilteringPostingsFormat(Lucene84)),
id=PostingsFormat(name=Direct)},
docValues:{dv3=DocValuesFormat(name=Asserting), dv2=DocValuesFormat\
(name=Lucene80), dv5=DocValuesFormat(name=Asserting),
dv=DocValuesFormat(name=Lucene80), dv4=DocValuesFormat(name=Lucene80)},
maxPointsInLeafNode=1228, maxMBSortInHeap=6.874571632539512, s\
im=Asserting(RandomSimilarity(queryNorm=true): {text_payloads=IB SPL-L1,
text_vectors=BM25(k1=1.2,b=0.75), text1=DFI(Saturated)}), locale=brx,
timezone=Indian/Chagos
[junit4] 2> NOTE: Linux 5.5.6-arch1-1 amd64/Oracle Corporation 11.0.6
(64-bit)/cpus=128,threads=1,free=522930136,total=536870912
[junit4] 2> NOTE: All tests run in this JVM: [TestIndexWriterOnVMError]
```
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