Steve Rowe created LUCENE-6546:
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Summary: Test2BPostingsBytes sometimes OOMs even with
-Dtests.heapsize=30g
Key: LUCENE-6546
URL: https://issues.apache.org/jira/browse/LUCENE-6546
Project: Lucene - Core
Issue Type: Bug
Components: general/test
Reporter: Steve Rowe
Priority: Minor
Here's an example:
[http://jenkins.sarowe.net/job/Lucene-core-nightly-monster-5.x-Java7/22/console];
the seed still OOMs for me when {{-Dtests.heapsize=60g}}:
{noformat}
ant test -Dtestcase=Test2BPostingsBytes -Dtests.method=test
-Dtests.seed=F99606D852DB1420 -Dtests.nightly=true -Dtests.slow=true
-Dtests.locale=sr_RS_#Latn -Dtests.timezone=America/Port-au-Prince
-Dtests.asserts=true -Dtests.file.encoding=ISO-8859-1
{noformat}
(Although the repro line doesn't include all of them - [~dawid.weiss] is this
expected? - the above-linked job runs with {{-Dtests.jvms=4
-Dtests.nightly=true -Dtests.monster=true -Dtests.heapsize=30g}}.)
I narrowed the problem down to {{CompressingCodec}} - any of the 4 subclasses -
with {{maxDocsPerChunk * blockSize}} less than 16. The other variable
randomized in {{CompressingCodec.randomInstance()}} is {{chunkSize}}, which
doesn't seem to be implicated in the OOMs.
I guess we could suppress {{CompressingCodec}}, or just expect OOMs from time
to time (the above condition happens fairly rarely). But I'd rather continue
to exercise {{CompressingCodec}} as much as possible.
Here are the OOMs I saw with {{-Dtests.heapsize=30g}} and
{{-Dtests.codec=CompressingCodec}}:
||compressionMode||chunkSize||maxDocsPerChunk||blockSize||
|DUMMY|3|2|1|
|DUMMY|7|1|1|
|FAST_DECOMPRESSION|10|9|1|
|FAST_DECOMPRESSION|31614|3|4|
|FAST|21879|1|9|
|DUMMY|3|3|1|
|HIGH_COMPRESSION|4167|10|1|
|HIGH_COMPRESSION|12437|2|5|
|DUMMY|4|3|2|
|HIGH_COMPRESSION|3|3|2|
|FAST_DECOMPRESSION|3339|10|1|
|DUMMY|2|5|3|
Here are some that did *not* OOM:
||compressionMode||chunkSize||maxDocsPerChunk||blockSize||
|DUMMY|4|4|4|
|DUMMY|4|2|246|
|FAST|30677|907|2|
|FAST_DECOMPRESSION|15165|2|10|
|FAST_DECOMPRESSION|28633|67|1|
|DUMMY|7|3|9|
|DUMMY|2835|9|3|
|DUMMY|25785|4|7|
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