Lei (Eddy) Xu created HDFS-12575:
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Summary: Improve test coverage for EC related edit logs ops
Key: HDFS-12575
URL: https://issues.apache.org/jira/browse/HDFS-12575
Project: Hadoop HDFS
Issue Type: Improvement
Components: erasure-coding
Affects Versions: 3.0.0-alpha4
Reporter: Lei (Eddy) Xu
Assignee: SammiChen
HDFS-12569 found that we have little test coverage for edit logs ops of erasure
coding.
And we've seen the following bug bring down SNN in our test environments:
{code}
6:42:18.177 AM ERROR FSEditLogLoader
Encountered exception on operation AddBlockOp [path=/tmp/foo/bar,
penultimateBlock=NULL, lastBlock=blk_1073743386_69322, RpcClientId=,
RpcCallId=-2]
java.lang.IllegalArgumentException: reportedBlock is not striped
at
com.google.common.base.Preconditions.checkArgument(Preconditions.java:88)
at
....
6:42:18.190 AM FATAL EditLogTailer
Unknown error encountered while tailing edits. Shutting down standby NN.
java.io.IOException: java.lang.IllegalArgumentException: reportedBlock is not
striped
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:251)
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:150)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:882)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:863)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:293)
at
{code}
We should add coverage for these important edit logs, i.e., set/unset policy,
enable/remove policies and etc are correctly persisted in edit logs, and test
the scenarios like:
* Restart NN
* Replay edits after checkpoint
* Apply edits on SNN.
* and etc.
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