Ajay Kumar created HADOOP-14889:
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Summary: Suppress the fsnamesystem lock warning on nn startup
Key: HADOOP-14889
URL: https://issues.apache.org/jira/browse/HADOOP-14889
Project: Hadoop Common
Issue Type: Improvement
Reporter: Ajay Kumar
If FsNameSystemLock is held for more than 10 seconds then we log stacktrace .
We can suppress this fsnamesystem lock warning on NameNode startup.
{code}
17/09/20 21:41:39 INFO namenode.FSNamesystem: FSNamesystem write lock held for
7159 ms via
java.lang.Thread.getStackTrace(Thread.java:1552)
org.apache.hadoop.util.StringUtils.getStackTrace(StringUtils.java:945)
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.writeUnlock(FSNamesystem.java:1659)
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1074)
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:703)
org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:688)
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:752)
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:992)
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:976)
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1701)
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1769)
Number of suppressed write-lock reports: 0
Longest write-lock held interval: 7159
{code}
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