Number of DataNodes less than target replication causes NameNode WARN message
every millisecond
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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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