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Posted to hdfs-dev@hadoop.apache.org by "patrick white (Created) (JIRA)" <ji...@apache.org> on 2012/03/06 20:13:59 UTC
[jira] [Created] (HDFS-3054) distcp -skipcrccheck has no effect
distcp -skipcrccheck has no effect
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Key: HDFS-3054
URL: https://issues.apache.org/jira/browse/HDFS-3054
Project: Hadoop HDFS
Issue Type: Bug
Components: tools
Affects Versions: 0.23.2
Reporter: patrick white
Using distcp with '-skipcrccheck' still seems to cause CRC checksums to happen.
Ran into this while debugging an issue associated with source and destination having different blocksizes, and not using the preserve blocksize parameter (-pb). In both 23.1 and 23.2 builds, trying to bypass the checksum verification by using the '-skipcrcrcheck' parameter had no effect, the distcp still failed on checksum errors.
Test scenario to reproduce;
do not use '-pb' and try a distcp from 20.205 (default blksize=128M) to .23 (default blksize=256M), the distcp fails on checksum errors, which is expected due to checksum calculation (tiered aggregation of all blks). Trying the same distcp only providing '-skipcrccheck' still fails with the same checksum error, it is expected that checksum would now be bypassed and the distcp would proceed.
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