[jira] [Work logged] (AVRO-2722) impl/DataFile.cc use of boost::mt19937 for DataFileWriteBase::makeSync is not thread safe

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AVRO-2722?focusedWorklogId=703815&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-703815 ]

ASF GitHub Bot logged work on AVRO-2722:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 05/Jan/22 08:47
            Start Date: 05/Jan/22 08:47
    Worklog Time Spent: 10m 
      Work Description: martin-g merged pull request #1365:
URL: https://github.com/apache/avro/pull/1365


   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 703815)
    Time Spent: 40m  (was: 0.5h)

> 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
>          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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