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From "Nigel Daley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1106) Number of DataNodes less than target replication causes NameNode WARN message every millisecond
Date Fri, 09 Mar 2007 23:10:09 GMT
Number of DataNodes less than target replication causes NameNode WARN message every millisecond
-----------------------------------------------------------------------------------------------

                 Key: HADOOP-1106
                 URL: https://issues.apache.org/jira/browse/HADOOP-1106
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.12.0
            Reporter: Nigel Daley
             Fix For: 0.13.0


When I startup a 4 DataNode cluster that already contains files with a target replication
of 3, but 2 of the DataNodes fail to come online (ie. there are fewer DataNodes then the target
replication), I get the following output in the NameNode log every millisecond or less, continued
forever:

2007-03-09 22:45:22,848 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,849 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,850 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,851 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,852 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,852 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,853 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,853 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2
2007-03-09 22:45:22,854 WARN org.apache.hadoop.fs.FSNamesystem: Not able to place enough replicas,
still in need of 2


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