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3210504 - HANA recovery hangs recovering a multistreamed backup via backint


  • HANA database recovery hangs when recovering a multistreamed backup via backint, in this example using Cohesity DataProtect 6.0.
  • No errors are seen in backint.log or backup.log traces.
  • hdbbackupcheck and hdbbackupdiag do not return any errors.
  • A multistreamed backup is being used, where parallel_data_backup_backint_channels in global.ini >1
  • Runtime dumps show threads with callstacks similar to the below hanging:

10000[thr=12345]: JobWrk1234 at
   0: 0x0000000000000000 in syscall+0x19 
   1: 0x0000000000000000 in Synchronization::Semaphore::timedWait
   2: 0x0000000000000000 in Backup::BackupDest_DestCallback::wait
   3: 0x0000000000000000 in Backup::BackupDest_DestinationSPI::receiveSynchronous
   4: 0x0000000000000000 in Backup::BackupDest_CommonDestinationReader::receiveAligned
   5: 0x0000000000000000 in Backup::BackupDest_DestinationReader::readDestinationHeader
   6: 0x0000000000000000 in Backup::BackupDest_DestinationReader::readDestinationHeader
   7: 0x0000000000000000 in Backup::BackupExe_JobRestore::readDestinationHeader
   8: 0x0000000000000000 in Backup::BackupExe_JobRestore::run


10001[thr=12456]: JobWrk1235 at
   0: 0x0000000000000000 in .annobin_open64.c+0xd2 
   1: 0x0000000000000000 in open64+0xa8 
   2: 0x0000000000000000 in System::UX::open
   3: 0x0000000000000000 in Stream::ReadPipeChannel::triggerOpen
   4: 0x0000000000000000 in Stream::ReadPipeChannel::triggerRead
   5: 0x0000000000000000 in Stream::PipeChannelJob::run
   6: 0x0000000000000000 in Execution::JobObjectImpl::run
   7: 0x0000000000000000 in Execution::JobWorker::runJob



HANA Platform 2.0


SAP HANA, platform edition 2.0


restore , KBA , HAN-DB-BAC , SAP HANA Backup & Recovery , Problem

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