ResolutionMointor dies on an exception
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Key: HADOOP-5777
URL: https://issues.apache.org/jira/browse/HADOOP-5777
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.18.3
Reporter: Hairong Kuang
One of our dfs clusters went into an unhealthy state, where many datanodes have
non-zero bytes but no rack information. It turned out the ResolutionMoinitor
thread dies on an exception. Here is the stack trace of the exception that
caused the problem:
ERROR org.apache.hadoop.fs.FSNamesystem:
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1938)
at java.lang.String.substring(String.java:1905)
at
org.apache.hadoop.net.NetworkTopology$InnerNode.getNextAncestorName(NetworkTopology.java:119)
at
org.apache.hadoop.net.NetworkTopology$InnerNode.add(NetworkTopology.java:153)
at org.apache.hadoop.net.NetworkTopology.add(NetworkTopology.java:329)
at
org.apache.hadoop.dfs.FSNamesystem$ResolutionMonitor.run(FSNamesystem.java:1885)
at java.lang.Thread.run(Thread.java:619)
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