Impact in NameNode scalability because heartbeat processing acquires the global
lock
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Key: HADOOP-4051
URL: https://issues.apache.org/jira/browse/HADOOP-4051
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.18.0, 0.17.2, 0.17.1, 0.17.0
Reporter: dhruba borthakur
The heartbeat processing code recently got rearranged via HADOOP-3254. This
caused the NameNode heartbeat processing code to acquire the FSNamesystem
global lock for every heartbeat processing. This could impact scalability of
the namenode.
This problem is present in 0.17.x and 0.18.x release only. It is not present in
0.16.x and on trunk.
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