[Bro-Dev] [JIRA] (BIT-1058) Memory leak in sumstats (probably)

Jon Siwek (JIRA) jira at bro-tracker.atlassian.net
Wed Aug 21 12:36:31 PDT 2013

     [ https://bro-tracker.atlassian.net/browse/BIT-1058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jon Siwek updated BIT-1058:

    Assignee: Robin Sommer
> Memory leak in sumstats (probably)
> ----------------------------------
>                 Key: BIT-1058
>                 URL: https://bro-tracker.atlassian.net/browse/BIT-1058
>             Project: Bro Issue Tracker
>          Issue Type: Problem
>          Components: Bro
>    Affects Versions: 2.2
>            Reporter: Bernhard Amann
>            Assignee: Robin Sommer
>            Priority: High
>              Labels: leak, sumstats
>             Fix For: 2.2
>         Attachments: out2.pdf
> At the moment, the core/leaks/basic-cluster.bro always fails; the gprof output is attached. Only the master node leaks memory, the two worker nodes are fine.
> From the gprof output, it looks like an increment operation is somehow triggering a memory leak.
> Robin and me tried to dig through this for quite some time. From our current understanding it looks like the memory leak is (indirectly) caused by an increment operation in a function that is called by an event that is received through remoteserialization.
> The closest we were able to track the leak to is line 249 of scripts/base/frameworks/sumstats/cluster.bro:
> {noformat}
> event SumStats::cluster_send_result(uid: string, ss_name: string, key: Key, result: Result, cleanup: bool)
>         {
> [...]
>         ++done_with[uid];
> }
> {noformat}
> Commenting out this line "fixes" the memory leak (and probably renders the sumstat framework inoperable); however we were not able to track it further to the exact cause; replacing the increment with an equivalent done_with[uid] = done_with[uid]+1; did not solve the problem.

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