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  • Troubleshooting DataStax Enterprise
  • Troubleshooting DSE OpsCenter

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Troubleshooting
  • Troubleshooting DataStax Enterprise

    Learn about issues experienced with DSE and solutions or workarounds.

    • Starting and installing DSE

      Troubleshooting problems when starting or installing DataStax Enterprise.

    • Linux related problems

      Fixing Linux related problems.

      • Peculiar Linux kernel performance problem on NUMA systems

        Problems due to zone_reclaim_mode.

      • Reads are getting slower while writes are still fast

        Too many SSTables can cause slow reads on Linux platforms.

      • Nodes seem to freeze after some period of time

        Some portion of the JVM is being swapped out by the Linux operating system.

      • Nodes are dying with OOM errors

        Nodes are dying with OutOfMemory exceptions on Linux platforms.

      • Nodetool or JMX connections failing on remote nodes

        Nodetool commands on Linux can be run locally but not on other nodes in the cluster.

      • Handling schema disagreements

        How to check for and resolve schema disagreements.

      • Garbage collection pauses

        Troubleshooting GC pauses of more than a second, or multiple pauses within a second that add up to a large fraction of that second.

      • Java reports an error saying there are too many open files

        How to list the open files when Java may not have enough open file descriptors on Linux platforms.

      • Insufficient user resource limits errors

        Insufficient resource limits may result in a number of errors in DataStax Enterprise on Linux platforms.

      • No DSE processing but high CPU usage

        Extremely high CPU usage but no DataStax Enterprise processing on Linux platforms.

      • Cannot initialize class org.xerial.snappy.Snappy

        On Linux platforms, an error may occur when Snappy compression/decompression is enabled although its library is available from the classpath.

      • Firewall idle connection timeout causes nodes to lose communication

        Troubleshooting information to prevent default idle connection timeout on Linux platforms.

    • Using nodetool sjk

      Use nodetool sjk mx to gather database information from MBeans.

    • DSE Graph

      Troubleshooting topics for DataStax Enterprise Graph.

    • DSE Analytics

      Adding or removing a Spark application, driver, or worker fails if it cannot be written to recovery storage.

    • DSE Search

      Actions to troubleshoot inconsistent DSE Search query results, finding custom files, trace Solr HTTP requests, and use MBeans.

    • Security

      Fixing problems with security.

    • Studio

      Tips for resolving problems in DataStax Studio.

    • Other troubleshooting

      Various troubleshooting topics.

  • Troubleshooting DSE OpsCenter

    Learn about issues experienced with OpsCenter and solutions or workarounds.

Troubleshooting Linux related problems

Fixing Linux related problems.

The DataStax Enterprise Help Center also provides troubleshooting information.

  • Peculiar Linux kernel performance problem on NUMA systems
    Problems due to zone_reclaim_mode.
  • Reads are getting slower while writes are still fast
    Too many SSTables can cause slow reads on Linux platforms.
  • Nodes seem to freeze after some period of time
    Some portion of the JVM is being swapped out by the Linux operating system.
  • Nodes are dying with OOM errors
    Nodes are dying with OutOfMemory exceptions on Linux platforms.
  • Nodetool or JMX connections failing on remote nodes
    Nodetool commands on Linux can be run locally but not on other nodes in the cluster.
  • Handling schema disagreements
    How to check for and resolve schema disagreements.
  • Garbage collection pauses
    Troubleshooting GC pauses of more than a second, or multiple pauses within a second that add up to a large fraction of that second.
  • Java reports an error saying there are too many open files
    How to list the open files when Java may not have enough open file descriptors on Linux platforms.
  • Insufficient user resource limits errors
    Insufficient resource limits may result in a number of errors in DataStax Enterprise on Linux platforms.
  • No DataStax Enterprise processing but high CPU usage
    Extremely high CPU usage but no DataStax Enterprise processing on Linux platforms.
  • Cannot initialize class org.xerial.snappy.Snappy
    On Linux platforms, an error may occur when Snappy compression/decompression is enabled although its library is available from the classpath.
  • Firewall idle connection timeout causes nodes to lose communication during low traffic times on Linux
    Troubleshooting information to prevent default idle connection timeout on Linux platforms.

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Build time: 2022-02-18 10:49:12.284

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