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https://issues.apache.org/jira/browse/HADOOP-1564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12510231
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dhruba borthakur edited comment on HADOOP-1564 at 7/4/07 11:56 AM:
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This test creates a bunch of files/directories with replication factor of 2.
Then verifies that a client can automatically accesses the remaining valid
replica inspite of the following types of simulated errors:
1. Delete meta file on one replica
2. Truncates meta file on one replica
3. Corrupts the meta file header on one replica
4. Corrupts any random offset and portion of the meta file
5. Swaps two meta files, i.e the format of the meta files are valid but their
CRCs do not match with their corresponding data blocks
Another portion of the test is commented out till HADOOP-1557 is addressed:
1. Create file with 2 replica, corrupt the meta file of replica, decrease
replication factor from 2 to 1. Validate that the remaining replica is the good
one.
2. Create file with 2 replica, corrupt the meta file of one replica, increase
replication factor of file to 3. verify that the new replica was created from
the non-corrupted replica.
was:
This test does the following creates a bunch of files/directories with
replication factor of 2. Then verifies that a client can automatically accesses
the remining valid replica inspite of the following tyoes of simulated errors:
1. Delete meta file on one replica
2. Truncates meta file on one replica
3. Corrupts the meta file header on one replica
4. Corrupts any random offset and portion of the meta file
5. Swaps two meta files, i.e the format of the meta files are valid but their
CRCs do not match with their corresponding data blocks
Another portion of the test is being commented out till HADOOP-1557 is
addressed:
1. Create file with 2 replica, corrupt the meta file of replica, decrease
replication factor from 2 to 1. Validate that the remaining replica is the good
one.
2. Create file with 2 replica, corrupt the meta file of one replica, increase
replication factor of file to 3. verify that the new replica was created from
the non-corrupted replica.
> Write unit tests to detect CRC corruption
> -----------------------------------------
>
> Key: HADOOP-1564
> URL: https://issues.apache.org/jira/browse/HADOOP-1564
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: crctest.3
>
>
> The unit tests should have some way to test the case when CRC files are
> corrupted.
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