Details
-
Bug
-
Status: Resolved
-
Major
-
Resolution: Fixed
-
None
-
None
-
None
-
None
-
Windows + Cygwin
Description
When I try to run a datanode on Windows, I get the following exception:
java.io.IOException: Expecting a line not the end of stream at org.apache.hadoop.fs.DU.parseExecResult(DU.java:181) at org.apache.hadoop.util.Shell.runCommand(Shell.java:179) at org.apache.hadoop.util.Shell.run(Shell.java:134) at org.apache.hadoop.fs.DU.<init>(DU.java:53) at org.apache.hadoop.fs.DU.<init>(DU.java:63) at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.<init>(FSDataset.java:325) at org.apache.hadoop.hdfs.server.datanode.FSDataset.<init>(FSDataset.java:681) at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:291) at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:205) at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1238) at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1193)
This is because Hadoop execs "du -sk C:\tmp\hadoop-SYSTEM\dfs\data" with a Windows path representation, which cygwin du doesn't understand.
C:\hudson>du -sk C:\tmp\hadoop-SYSTEM\dfs\data du -sk C:\tmp\hadoop-SYSTEM\dfs\data du: cannot access `C:\\tmp\\hadoop-SYSTEM\\dfs\\data': No such file or directory
For this to work correctly, Hadoop would have to run cygpath first to get a Unix path representation, then to call DU.
Also, I had to use the debugger to get this information. Shell.runCommand should catch IOException from parseExecResult and add the buffered stderr to simplify the error diagnostics.
Attachments
Attachments
Issue Links
- is related to
-
MAPREDUCE-401 du fails on Ubuntu in TestJobHistory
- Resolved