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https://issues.apache.org/jira/browse/DISPATCH-1897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17252912#comment-17252912
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Charles E. Rolke commented on DISPATCH-1897:
--------------------------------------------
Libwebsockets team has seen this before:
[https://github.com/warmcat/libwebsockets/issues/1769]
The recommendation is to set *ulimit -Sn* to a reasonable number to prevent
trying to allocate an unreasonable number of fds.
The ulimit on the host or VM where the tests are running should be checked.
> Console http libwebsocket realloc error Out Of Memory
> -----------------------------------------------------
>
> Key: DISPATCH-1897
> URL: https://issues.apache.org/jira/browse/DISPATCH-1897
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Router Node
> Affects Versions: 1.14.0
> Environment: Build dockerfiles/Dockerfile-fedora on a Fedora 32
> 64-bit host and run system_tests_tcp_adaptor there.
> Building the docker image on a Fedora 31 64-bit host works properly.
> Reporter: Charles E. Rolke
> Priority: Major
>
> An ordinary http listener fails with a wild 64-but realloc:
> {code:java}
> 2020-12-17 19:27:11.483999 +0000 HTTP (trace) Event loop: poll
> (/main/qpid-dispatch/src/http-libwebsockets.c:61)
> 2020-12-17 19:27:11.484005 +0000 HTTP (trace) _realloc: size 6944: context
> (/main/qpid-dispatch/src/http-libwebsockets.c:61)
> 2020-12-17 19:27:11.484015 +0000 HTTP (trace) _realloc: size 72:
> lws_smd_register (/main/qpid-dispatch/src/http-libwebsockets.c:61)
> 2020-12-17 19:27:11.484021 +0000 HTTP (trace) lws_smd_register: registered
> (/main/qpid-dispatch/src/http-libwebsockets.c:61)
> 2020-12-17 19:27:11.484032 +0000 HTTP (trace) _realloc: size
> 18446744073709551552: fds table
> (/main/qpid-dispatch/src/http-libwebsockets.c:61)
> 2020-12-17 19:27:11.484038 +0000 HTTP (error) OOM allocating 1073741816 fds
> (/main/qpid-dispatch/src/http-libwebsockets.c:61)
> {code}
> This issue was originally reported in DISPATCH-1895 at
> [https://travis-ci.com/github/apache/qpid-dispatch/jobs/461797267]
> There the problem was stated as a test hang in system_tests_tcp_adaptor. Test
> orchestration failed when it was creating the first router
> * _wait=true_
> * Router subprocess is started
> * Test frameworks waits for all ports to accept a TCP connection
> Due to the error the http listener port went dead. The test timed out waiting
> for the http port to come up.
> The diagnostic logs quoted here were not available from the travis-ci system
> but were found after some other system setup produced the same error.
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