J.Andreina created YARN-4244:
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Summary: BlockPlacementPolicy related logs should contain the
details about the filename and blockid
Key: YARN-4244
URL: https://issues.apache.org/jira/browse/YARN-4244
Project: Hadoop YARN
Issue Type: Improvement
Reporter: J.Andreina
Assignee: J.Andreina
Currently the user will not get the details about which file/block , the
BlockPlacementPolicy is not able to find a replica node , if there is a huge
client write operation is going on.
For example consider below failure message , which does'nt have details about
file/block , which will be difficult to track later.
{noformat}
final String message =
"Failed to place enough replicas, still in need of "
+ (totalReplicasExpected - results.size()) + " to reach " +
totalReplicasExpected
+ " (unavailableStorages=" + unavailableStorages + ",
storagePolicy="
+ storagePolicy + ", newBlock=" + newBlock + ")";
String msg = "All required storage types are unavailable: "
+ " unavailableStorages=" + unavailableStorages
+ ", storagePolicy=" + storagePolicy.getName();
{noformat}
It is better to provide the file/block information in the logs for better
debugability .
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