ferhui commented on code in PR #6654:
URL: https://github.com/apache/hadoop/pull/6654#discussion_r1538685277
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
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@@ -6120,7 +6121,7 @@ private void updatePipelineInternal(String clientName,
ExtendedBlock oldBlock,
*/
void registerBackupNode(NamenodeRegistration bnReg,
NamenodeRegistration nnReg) throws IOException {
- writeLock();
+ writeLock(FSNamesystemLockMode.FS);
Review Comment:
Why use the different locks in register and release methods?
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