Steve Rowe commented on LUCENE-8106:

I attached a patch to address {{IncompleteRead}} exceptions that have been 
occurring occasionally during download of the Jenkins log, e.g. from 

[repro] Jenkins log URL: 

[repro] Revision: db1360fac40fe472f881a37d6a0f0187491e308c

[repro] Ant options: "-Dargs=-XX:-UseCompressedOops -XX:+UseSerialGC"
Traceback (most recent call last):
  File "/usr/lib/python3.4/http/client.py", line 614, in _readinto_chunked
    chunk_left = self._read_next_chunk_size()
  File "/usr/lib/python3.4/http/client.py", line 559, in _read_next_chunk_size
    return int(line, 16)
ValueError: invalid literal for int() with base 16: b''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "dev-tools/scripts/reproduceJenkinsFailures.py", line 276, in <module>
  File "dev-tools/scripts/reproduceJenkinsFailures.py", line 226, in main
    tests = fetchAndParseJenkinsLog(config.url)
  File "dev-tools/scripts/reproduceJenkinsFailures.py", line 108, in 
    for rawLine in consoleText:
  File "/usr/lib/python3.4/http/client.py", line 500, in read
    return super(HTTPResponse, self).read(amt)
  File "/usr/lib/python3.4/http/client.py", line 529, in readinto
    return self._readinto_chunked(b)
  File "/usr/lib/python3.4/http/client.py", line 618, in _readinto_chunked
    raise IncompleteRead(bytes(b[0:total_bytes]))
http.client.IncompleteRead: IncompleteRead(0 bytes read)
Build step 'Execute shell' marked build as failure

Committing shortly.

> Add script to attempt to reproduce failing tests from a Jenkins log
> -------------------------------------------------------------------
>                 Key: LUCENE-8106
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8106
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Steve Rowe
>            Assignee: Steve Rowe
>            Priority: Major
>             Fix For: 7.3, master (8.0)
>         Attachments: LUCENE-8106-part2.patch, LUCENE-8106-part3.patch, 
> LUCENE-8106-part4.patch, LUCENE-8106.part5.patch, LUCENE-8106.patch, 
> LUCENE-8106.patch
> This script will be runnable from a downstream job triggered by an upstream 
> failing Jenkins job, passing log location info between the two.
> The script will also be runnable manually from a developer's cmdline.
> From the script help:
> {noformat}
> Usage:
>      python3 -u reproduceJenkinsFailures.py URL
> Must be run from a Lucene/Solr git workspace. Downloads the Jenkins
> log pointed to by the given URL, parses it for Git revision and failed
> Lucene/Solr tests, checks out the Git revision in the local workspace,
> groups the failed tests by module, then runs
> 'ant test -Dtest.dups=5 -Dtests.class="*.test1[|*.test2[...]]" ...'
> in each module of interest, failing at the end if any of the runs fails.
> To control the maximum number of concurrent JVMs used for each module's
> test run, set 'tests.jvms', e.g. in ~/lucene.build.properties
> {noformat}

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