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Intermittent timeouts reported and High CPU observed after StorageGrid Expansion

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storagegrid
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Applies to

  • NetApp StorageGRID
  • Active-Backup High Availability (HA) Groups

Issue

  • Following a StorageGRID expansion, clients observe intermittent SSL TLS handshake timeouts and degraded S3 performance on GETS/PUTS.
  • Example client error observed:
* [<name>: Failed to obtain output stream from connection for object [xxx], Fixed Content Device [{xxx-xxx-xxx]] Message was: Read timed out]\n at com.filenet.engine.content.fcprovider.handlers.s3.XXX.createContentObjectFromFile(XXX.java:523)\n at com.filenet.engine.content.fcprovider.handlers.s3.XXX.createContentObjectFromFile(XXX.java:432)\n at com.filenet.engine.content.fcprovider.handlers.s3.XXXX.createContent(XXXX.java:320)\n
  • Some GETS not recording in the /var/local/log/nginx-gw/endpoint-access.log as expected, indicating the request not reaching the GRID.
  • Active Load Balancer records spike in CPU and running at ~85% or higher.

cpuutilization.png

  • node_nf_conntrack_entries in Prometheus show connections almost double after adding more storage nodes.

nodenfconntrack.png

  • Increase in HTTP sessions on all storage nodes via rate(storagegrid_http_sessions_incoming_attempted[5m]) in Prometheus.

httpsessions.png

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