[GitHub] [hadoop] umamaheswararao commented on pull request #5743: HDFS-17049. EC: Fix duplicate block group IDs generated by SequentialBlockGroupIdGenerator.

["umamaheswararao (via GitHub)" <gi...@apache.org>]

umamaheswararao commented on PR #5743:
URL: https://github.com/apache/hadoop/pull/5743#issuecomment-1592121456

   Quite surprised to see how this can happen, we have write lock while getting nextBlockID
   
   ```
   private long nextBlockId(BlockType blockType) throws IOException {
     assert hasWriteLock();
     checkNameNodeSafeMode(“Cannot get next block ID”);
     final long blockId = blockManager.nextBlockId(blockType);
     getEditLog().logAllocateBlockId(blockId);
   ```


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