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Posted to dev@zookeeper.apache.org by "Marshall McMullen (JIRA)" <ji...@apache.org> on 2015/11/02 21:37:27 UTC
[jira] [Commented] (ZOOKEEPER-2311) assert in setup_random
[ https://issues.apache.org/jira/browse/ZOOKEEPER-2311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985978#comment-14985978 ]
Marshall McMullen commented on ZOOKEEPER-2311:
----------------------------------------------
Another interesting link related to this:
https://bugzilla.kernel.org/show_bug.cgi?id=80981
> assert in setup_random
> ----------------------
>
> Key: ZOOKEEPER-2311
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2311
> Project: ZooKeeper
> Issue Type: Bug
> Components: c client
> Reporter: Marshall McMullen
>
> We've started seeing an assert failing inside setup_random at line 537:
> 528 static void setup_random()
> 529 {
> 530 #ifndef _WIN32 // TODO: better seed
> 531 int seed;
> 532 int fd = open("/dev/urandom", O_RDONLY);
> 533 if (fd == -1) {
> 534 seed = getpid();
> 535 } else {
> 536 int rc = read(fd, &seed, sizeof(seed));
> 537 assert(rc == sizeof(seed));
> 538 close(fd);
> 539 }
> 540 srandom(seed);
> 541 srand48(seed);
> 542 #endif
> The core files show:
> Program terminated with signal 6, Aborted.
> #0 0x00007f9ff665a0d5 in raise () from /lib/x86_64-linux-gnu/libc.so.6
> #0 0x00007f9ff665a0d5 in raise () from /lib/x86_64-linux-gnu/libc.so.6
> #1 0x00007f9ff665d83b in abort () from /lib/x86_64-linux-gnu/libc.so.6
> #2 0x00007f9ff6652d9e in ?? () from /lib/x86_64-linux-gnu/libc.so.6
> #3 0x00007f9ff6652e42 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
> #4 0x00007f9ff8e4070a in setup_random () at src/zookeeper.c:476
> #5 0x00007f9ff8e40d76 in resolve_hosts (zh=0x7f9fe14de400, hosts_in=0x7f9fd700f400 "10.26.200.6:2181,10.26.200.7:2181,10.26.200.8:2181", avec=0x7f9fd87fab60) at src/zookeeper.c:730
> #6 0x00007f9ff8e40e87 in update_addrs (zh=0x7f9fe14de400) at src/zookeeper.c:801
> #7 0x00007f9ff8e44176 in zookeeper_interest (zh=0x7f9fe14de400, fd=0x7f9fd87fac4c, interest=0x7f9fd87fac50, tv=0x7f9fd87fac80) at src/zookeeper.c:1980
> #8 0x00007f9ff8e553f5 in do_io (v=0x7f9fe14de400) at src/mt_adaptor.c:379
> #9 0x00000000020170ac in solidfire::ThreadBacktraces::LaunchThread (this=0x7f9ff0c8d500, args=<optimized out>) at shared/ThreadBacktraces.cpp:497
> #10 0x00007f9ff804de9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
> #11 0x00007f9ff671738d in clone () from /lib/x86_64-linux-gnu/libc.so.6
> #12 0x0000000000000000 in ?? ()
> I'm not sure what the underlying cause of this is... But POSIX always allows for a short read(2), and any program MUST check for short reads...
> Has anyone else encountered this issue? We are seeing it rather frequently which is concerning.
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