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n0rad edited comment on CASSANDRA-11594 at 8/23/16 12:20 PM: ------------------------------------------------------------- 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 -- This message was sent by Atlassian JIRA (v6.3.4#6332)