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From Jeff Jirsa <jji...@gmail.com>
Subject Re: Nodetool compactionstats hangs
Date Tue, 19 Dec 2017 12:38:32 GMT
Can you grab a thread dump with jstack as well? 

-- 
Jeff Jirsa


> On Dec 19, 2017, at 3:32 AM, Hannu Kröger <hkroger@gmail.com> wrote:
> 
> Hi,
> 
> I opened a ticket about nodetool compactionstats hanging:
> https://issues.apache.org/jira/browse/CASSANDRA-14130
> 
> The root cause seems to be JMX metric fetching hanging. I was able to replicate it on
this problematic like this:
> Welcome to JMX terminal. Type "help" for available commands.
> $>open localhost:7199
> #Connection to localhost:7199 is opened
> $>bean org.apache.cassandra.metrics:type=Compaction,name=PendingTasksByTableName
> #bean is set to org.apache.cassandra.metrics:type=Compaction,name=PendingTasksByTableName
> $>get Value
> #mbean = org.apache.cassandra.metrics:type=Compaction,name=PendingTasksByTableName:
> // This command never finishes.
> 
> This happens only on one node AFAIK. What could possibly be the problem?
> Hannu

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