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Jonathan Ellis resolved CASSANDRA-7220. --------------------------------------- Resolution: Cannot Reproduce Assignee: (was: Ryan McGuire) > Nodes hang with 100% CPU load > ----------------------------- > > Key: CASSANDRA-7220 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7220 > Project: Cassandra > Issue Type: Bug > Components: Core > Environment: C* 2.0.7 > 4 nodes cluster on 12 core machines > Reporter: Robert Stupp > Attachments: c-12-read-100perc-cpu.zip, system.log > > > I've ran a test that both reads and writes rows. > After some time, all writes succeeded and all reads stopped. > Two of the four nodes have 16 of 16 threads of the "ReadStage" thread pool > running. The number of pending task continuouly grows on these nodes. > I have attached outputs of the stack traces and some diagnostic output from > "nodetool tpstats" > "nodetool status" shows all nodes as UN. > I had run that test previously without any issues in with the same > configuration. > Some "specials" from cassandra.yaml: > - key_cache_size_in_mb: 1024 > - row_cache_size_in_mb: 8192 > The nodes running at 100% CPU are "node2" and "node3". node1&node4 are fine. > I'm not sure if it is reproducable - but it's definitly not a good behaviour. -- This message was sent by Atlassian JIRA (v6.3.4#6332)