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https://issues.apache.org/jira/browse/AVRO-2722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469268#comment-17469268
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ASF subversion and git services commented on AVRO-2722:
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Commit 980046077dda2d0192d101178af87ca510578b2a in avro's branch
refs/heads/branch-1.11 from Martin Tzvetanov Grigorov
[ https://gitbox.apache.org/repos/asf?p=avro.git;h=9800460 ]
AVRO-2722 Move the 'random' variable to be local to the method where it is
being used
This avoids thread-safety issues.
(cherry picked from commit a906d79b5bd15d7a773b54b06bdc0ffb308cca6b)
> impl/DataFile.cc use of boost::mt19937 for DataFileWriteBase::makeSync is not
> thread safe
> -----------------------------------------------------------------------------------------
>
> Key: AVRO-2722
> URL: https://issues.apache.org/jira/browse/AVRO-2722
> Project: Apache Avro
> Issue Type: Bug
> Components: c++
> Affects Versions: 1.9.1
> Environment: Issue can be reproduced in Linux with clang and on
> Android arm64 and armeabi with android NDK r19c.
> Reporter: Dan Schmitt
> Assignee: Martin Tzvetanov Grigorov
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.11.1
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> The single instance of random is not thread safe, and can seg fault.
> It can be fixed with a global std::mutex next to the global boost::mt19937
> generator and a std::unique_lock in the method, or by creating the
> mersenne_twister_engine as a local variable in the function.
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