FAQ
HDFS Junit test TestWriteRead failed with inconsistent visible length of a file
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Key: HDFS-2021
URL: https://issues.apache.org/jira/browse/HDFS-2021
Project: Hadoop HDFS
Issue Type: Bug
Environment: Linux RHEL5
Reporter: CW Chung
Assignee: John George
Priority: Minor


The junit test failed when iterates a number of times with larger chunk size on Linux. Once a while, the visible number of bytes seen by a reader is slightly less than what was supposed to be.

When run with the following parameter, it failed more often on Linux ( as reported by John George) than my Mac:
private static final int WR_NTIMES = 300;
private static final int WR_CHUNK_SIZE = 10000;

Adding more debugging output to the source, this is a sample of the output:
Caused by: java.io.IOException: readData mismatch in byte read: expected=2770000 ; got 2765312
at org.apache.hadoop.hdfs.TestWriteRead.readData(TestWriteRead.java:141)


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postedMay 31, '11 at 9:17p
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