Deadlock while leaving safe mode.
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Key: HADOOP-4904
URL: https://issues.apache.org/jira/browse/HADOOP-4904
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.18.3
Reporter: Konstantin Shvachko
Priority: Blocker
Fix For: 0.18.3
{{SafeModeInfo.leave()}} acquires locks in an incorrect order, which causes the
deadlock.
It first acquires the {{SafeModeInfo}} lock, then calls
{{FSNamesystem.processMisReplicatedBlocks()}}, which requires the global
{{FSNamesystem}} lock.
It should be the other way around: first {{FSNamesystem}} lock, then
{{SafeModeInfo}}.
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