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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2022/06/09 05:42:30 UTC

[GitHub] [pulsar] wuxuanqicn commented on issue #15896: Flaky-test: PulsarLedgerIdGeneratorTest.testGenerateLedgerId

wuxuanqicn commented on issue #15896:
URL: https://github.com/apache/pulsar/issues/15896#issuecomment-1150694056

   On my local environment, RocksdbMetadataStore.java is the cause,  it is transaction lock timout with default value 1 second, and 60 seconds don't work on my environment either.
   ```
   2022-06-09T10:23:45,794 - ERROR - [pool-10-thread-1:PulsarLedgerIdGenerator@68] - Error generating ledger id: org.apache.pulsar.metadata.api.MetadataStoreException: org.rocksdb.RocksDBException: TimedOut(LockTimeout)
   ```
   
   there are two plans i have,
   1. make method RocksdbMetadataStore#storePut synchronized, since Rocksdb as metadata store is mostly used at light-weight environment with light workload
   2. make RocksdbMetadataStore extend AbstractBatchedMetadataStore to avoid multi-thread operation
   
   https://github.com/apache/pulsar/blob/c4fcaa6824095028f1d4ba829baa2ff8b3870107/pulsar-metadata/src/main/java/org/apache/pulsar/metadata/impl/RocksdbMetadataStore.java#L513-L526
   
   @Jason918 since you introduced this class at #12776 , what's your opinon?


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