[jira] [Updated] (STORM-83) zeromq send can cause divide by 0 in multithreaded cod

["Rick Kellogg (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STORM-83?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rick Kellogg updated STORM-83:
------------------------------
    Component/s: storm-core

> zeromq send can cause divide by 0 in multithreaded cod
> ------------------------------------------------------
>
>                 Key: STORM-83
>                 URL: https://issues.apache.org/jira/browse/STORM-83
>             Project: Apache Storm
>          Issue Type: Bug
>          Components: storm-core
>            Reporter: James Xu
>            Priority: Minor
>
> https://github.com/nathanmarz/storm/issues/474
> When running the unit tests I got a SIGFPE (FPE_INTDIV) in zmq::lb_t::send(zmq_msg_t*, int)+0x176 I traced this down to line 137 of lb.cpp in version 2.1.7 of zeromq. The error is a divide by 0 error. The denominator in this code is an active count, and about 7 lines above active passed a check for 0. zmq::lb_t is very much not thread safe, but it looks like we are somehow calling a single instance of it from multiple threads.



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