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https://issues.apache.org/jira/browse/CASSANDRA-11594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15432661#comment-15432661
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n0rad edited comment on CASSANDRA-11594 at 8/23/16 12:20 PM:
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So yesterday, I worked on getting a dump :
!https://issues.apache.org/jira/secure/attachment/12825037/Grafana%20%20%20Cassandra%20%20%20Cluster.png!
I wanted to let the night pass and do repair on other nodes to reach something
like 70k before dumping but 3 nodes crashed at 7am and let the cluster
unavailable.
Since it's a production cluster I dumped node2 à ~20k and get back production
to life.
was (Author: n0rad):
So yesterday, I worked on getting a dump :
!https://issues.apache.org/jira/secure/attachment/12825037/Grafana%20%20%20Cassandra%20%20%20Cluster.png!
I wanted to let the night pass and do repair on other nodes to reach something
like 70k before dumping but 3 nodes crashed at 6am and let the cluster
unavailable.
Since it's a production cluster I dumped node2 à ~20k and get back production
to life.
> Too many open files on directories
> ----------------------------------
>
> Key: CASSANDRA-11594
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11594
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: n0rad
> Assignee: Stefania
> Priority: Critical
> Attachments: Grafana Cassandra Cluster.png, openfiles.zip,
> screenshot.png
>
>
> I have a 6 nodes cluster in prod in 3 racks.
> each node :
> - 4Gb commitlogs on 343 files
> - 275Gb data on 504 files
> On saturday, 1 node in each rack crash with with too many open files (seems
> to be the similar node in each rack).
> {code}
> lsof -n -p $PID give me 66899 out of 65826 max
> {code}
> it contains 64527 open directories (2371 uniq)
> a part of the list :
> {code}
> java 19076 root 2140r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2141r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2142r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2143r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2144r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2145r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2146r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2147r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2148r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2149r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2150r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2151r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2152r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2153r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2154r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> java 19076 root 2155r DIR 8,17 143360 4386718705
> /opt/stage2/pod-cassandra-aci-cassandra/rootfs/data/keyspaces/email_logs_query/emails-2d4abd00e9ea11e591199d740e07bd95
> {code}
> The 3 others nodes crashes 4 hours later
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