Wei-Chiu Chuang created HDDS-12982:
--------------------------------------
Summary: [Snapshot] Tone down error "Snapshot validation failed"
Key: HDDS-12982
URL: https://issues.apache.org/jira/browse/HDDS-12982
Project: Apache Ozone
Issue Type: Sub-task
Components: Snapshot
Affects Versions: 2.0.0
Reporter: Wei-Chiu Chuang
We sometimes observe this error
{noformat}
2024-12-02 18:47:09,542 ERROR [OM StateMachine ApplyTransaction Thread -
0]-org.apache.hadoop.ozone.om.request.key.OMKeyPurgeRequest: Error occurred
while performing OmKeyPurge.
INVALID_REQUEST org.apache.hadoop.ozone.om.exceptions.OMException: Snapshot
validation failed. Expected previous snapshotId : null but was
e639ca0c-73a1-4a60-8da5-c21ed9634210
at
org.apache.hadoop.ozone.om.snapshot.SnapshotUtils.validatePreviousSnapshotId(SnapshotUtils.java:303)
at
org.apache.hadoop.ozone.om.request.key.OMKeyPurgeRequest.validateAndUpdateCache(OMKeyPurgeRequest.java:83)
at
org.apache.hadoop.ozone.protocolPB.OzoneManagerRequestHandler.handleWriteRequest(OzoneManagerRequestHandler.java:378)
at
org.apache.hadoop.ozone.om.ratis.OzoneManagerStateMachine.runCommand(OzoneManagerStateMachine.java:560)
at
org.apache.hadoop.ozone.om.ratis.OzoneManagerStateMachine.lambda$1(OzoneManagerStateMachine.java:353)
at
java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
{noformat}
According to the analysis made by [~swamirishi] and [~sshenoy] this exception
is acceptable.
bq. This is kind of a race condition with snapshotCreate and keyPurge happening
on the background service. Purge operation takes a lesser priority over
snapshot create. So this kind of error can be ignored.
I am aware we'll be implementing locking for the snapshot operations so race
condition shouldn't happen after that. I'd suggest to reduce the log level from
ERROR to WARN.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
