IBM Support

IJ04179: DATA NODE REBALANCING CAN SOMETIMES CREATE AN UNBALANCED CLUSTER WHEN WITHIN 5% OF BEING IN BALANCE

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as suggestion for future release.

Error description

  • It has been identified that Data Node rebalancing can sometimes
    create an unbalanced cluster under certain conditions.
    
    This has been observed primarily in instances where the data
    "source" is much larger in size than the "destination" and the
    nodes start to rebalance when within 5% of being in balance.
    It could also occur when rebalancing is interrupted
    (communication failures, deploys, restarting tunnels, etc).
    
    Messages similar to the following might be visible in
    /var/log/qradar.error when this issue is occurring:
    
    [ariel.ariel_query_server] [agt0_3:events]
    com.ibm.si.ariel.dcs.databalancing.DTClient: [INFO]
    [NOT:0000006000][127.0.0.1/- -] [-/- -]  DataBlockEnd DNStatus
    [status=WAIT, usableSpace=12981362204672,
    totalSpace=30979435503616, volume=/dev/sda8, storeInfo/store
    (/dev/sda8)], Free space: 41.903159
    [ariel.ariel_query_server] [agt0_3:events]
    com.ibm.si.ariel.dcs.databalancing.DTClient: [INFO]
    [NOT:0000006000][127.0.0.1/- -] [-/- -]DataBlockBegin to
    10.162.192.54:32006 (160 -> 131, Path:
    /store/ariel/events/records/2017/5/18/5[17-05-18,05:00:00])
    DNStatus [status=EXECUTE, usableSpace=12981247987712,
    totalSpace=30979435503616, volume=/dev/sda8, storeInfo/store
    (/dev/sda8)]
    [ariel.ariel_query_server] [Thread-15]
    com.ibm.si.ariel.dcs.config.DataClusterConfiguration: [INFO]
    [NOT:0000006000][127.0.0.1/- -] [-/- -]Notifying listeners:
    [com.ibm.si.ariel.dcs.databalancing.DTC]
    [ariel.ariel_query_server] [agt0_3:events]
    com.ibm.si.ariel.dcs.databalancing.DTClient: [INFO]
    [NOT:0000006000][127.0.0.1/- -] [-/- -]  DataBlockEnd DNStatus
    [status=WAIT, usableSpace=12966030823424,
    totalSpace=30979435503616, volume=/dev/sda8, storeInfo/store
    (/dev/sda8)], Free space: 41.853670
    [ariel.ariel_query_server] [agt0_3:events]
    com.ibm.si.ariel.dcs.databalancing.SourceTask: [INFO]
    [NOT:0000006000][127.0.0.1/- -] [-/- -]Rebalancing destination
    reached the target free space 41.865007 while data still left
    on source. Lowering target to 19.000000
    

Local fix

  • No workaround available.
    

Problem summary

Problem conclusion

Temporary fix

Comments

  • Suggestion. The APAR identifies a function/operation that is not
    within the product specifications, for which a fix is not
    planned. Implementation of this modification would be a product
    enhancement. This APAR is considered for any future
    products/releases.
    

APAR Information

  • APAR number

    IJ04179

  • Reported component name

    QRADAR SOFTWARE

  • Reported component ID

    5725QRDSW

  • Reported release

    722

  • Status

    CLOSED SUG

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-02-15

  • Closed date

    2018-11-30

  • Last modified date

    2018-11-30

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"}, "Product":{"code":"SSBQAC","label":"IBM Security QRadar SIEM"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"722","Edition":""}]

Document Information

Modified date:
30 November 2018