IT31273: 'VSNAP POOL REMOVELOG' FAILS DUE TO TIMEOUT

APAR status

• Closed as program error.

Error description

• When it is needed to remove log file system from a vSnap storage
  pool, e.g. due to a failing disk, the vsnap command could time
  out.
  The vSnap log will show:
  
  [time] INFO pid-7060 vsnap.cli    CLI process started: ['pool',
  'removelog', '--id', '1']
  [time] INFO pid-7060 vsnap.zfs    Updating pool id 1 to remove
  all log disks
  ...
  [time] ERROR pid-7060 vsnap.linux.system    Timed out (480
  seconds) waiting for command to complete: zpool remove vpool1
  mirror-5
  [time] INFO pid-7060 vsnap.linux.system    Collecting process
  stacks in /opt/vsnap/log/stacks_hungproc_7074_1575102856.txt
  
  
  IBM Spectrum Protect Plus Versions Affected:
  IBM Spectrum Protect Plus 10.1.x and above
  
  Initial Impact: Medium
  
  Additional Keywords: SPP, SPPlus, TS003076677
  

Local fix

• Run the underlying zpool command instead of the vsnap command.
  Determine the name of the log device to be removed:
    sudo zpool status
  Remove the log device:
    sudo zpool remove vpool1 mirror-1
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect Plus level 10.1.5                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed in IBM Spectrum Protect Plus level     *
  * 10.1.6. Note that this is subject to change at the           *
  * discretion of IBM.                                           *
  ****************************************************************
  

Problem conclusion

• Safely detaching a log or cache device from a vSnap pool can
  take several minutes especially if the pool is undergoing other
  I/O activity at the time of the removal. The vSnap CLI command
  for detaching a log/cache device did not wait long enough. It
  timed out too quickly and reported a failure even though the
  underlying removal was still in progress. The problem has been
  resolved by eliminating the redundant timeout mechanism at the
  CLI layer. The CLI now waits as long as necessary as long as the
  underlying removal is still in progress.
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels