Symptom
- 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
Read more...
Environment
HANA Platform 2.0
Product
Keywords
restore , KBA , HAN-DB-BAC , SAP HANA Backup & Recovery , Problem
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