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From "Joaquin Casares (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4104) Cassandra appears to hang when JNA enabled and heapsize > free memory
Date Thu, 05 Apr 2012 01:37:18 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246931#comment-13246931
] 

Joaquin Casares commented on CASSANDRA-4104:
--------------------------------------------

I did manage to see this with 512MB of RAM and a heap space of 256MB. -f didn't help and output.log
wasn't written yet.

I do agree this is out of scope since Cassandra shouldn't be run on such a small system. Hopefully
in the future mlockall or Java will error out a bit nicer.
                
> Cassandra appears to hang when JNA enabled and heapsize > free memory
> ---------------------------------------------------------------------
>
>                 Key: CASSANDRA-4104
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4104
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.0.8
>            Reporter: Joaquin Casares
>            Priority: Minor
>              Labels: datastax_qa
>
> When JNA is enabled heapsize is larger than free memory, all that is printed out is the
classpath, then the printouts stop.
> If you hit enter again, you get the commandline, but no Cassandra process is running.
> Tested on both OpenJDK and Oracle Java.
> {noformat}
> datastax@datastax-image:~/repos/cassandra$ free -m
>              total       used       free     shared    buffers     cached
> Mem:          2008        740       1267          0          3         54
> -/+ buffers/cache:        682       1326
> Swap:            0          0          0
> datastax@datastax-image:~/repos/cassandra$ sudo bin/cassandra
> datastax@datastax-image:~/repos/cassandra$  INFO 14:31:32,520 Logging initialized
>  INFO 14:31:32,533 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_31
>  INFO 14:31:32,534 Heap size: 1247805440/1247805440
>  INFO 14:31:32,534 Classpath: bin/../conf:bin/../build/classes/main:bin/../build/classes/thrift:bin/../lib/antlr-3.2.jar:bin/../lib/avro-1.4.0-fixes.jar:bin/../lib/avro-1.4.0-sources-fixes.jar:bin/../lib/commons-cli-1.1.jar:bin/../lib/commons-codec-1.2.jar:bin/../lib/commons-lang-2.4.jar:bin/../lib/compress-lzf-0.8.4.jar:bin/../lib/concurrentlinkedhashmap-lru-1.2.jar:bin/../lib/guava-r08.jar:bin/../lib/high-scale-lib-1.1.2.jar:bin/../lib/jackson-core-asl-1.4.0.jar:bin/../lib/jackson-mapper-asl-1.4.0.jar:bin/../lib/jamm-0.2.5.jar:bin/../lib/jline-0.9.94.jar:bin/../lib/jna.jar:bin/../lib/json-simple-1.1.jar:bin/../lib/libthrift-0.6.jar:bin/../lib/log4j-1.2.16.jar:bin/../lib/servlet-api-2.5-20081211.jar:bin/../lib/slf4j-api-1.6.1.jar:bin/../lib/slf4j-log4j12-1.6.1.jar:bin/../lib/snakeyaml-1.6.jar:bin/../lib/snappy-java-1.0.4.1.jar:bin/../lib/jamm-0.2.5.jar
> datastax@datastax-image:~/repos/cassandra$ ps auwx | grep cass
> datastax 18374  1.0  0.0  13448   904 pts/2    S+   14:32   0:00 grep --color=auto cass
> {noformat}

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