hanishakoneru commented on a change in pull request #448: HDDS-2870. Handle
replay of KeyCreate requests.
URL: https://github.com/apache/hadoop-ozone/pull/448#discussion_r370399963
##########
File path:
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/key/OMKeyCreateRequest.java
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@@ -174,26 +182,40 @@ public OMClientResponse
validateAndUpdateCache(OzoneManager ozoneManager,
// bucket encryptionInfo will be not set. If this assumption holds
// true, we can avoid get from bucket table.
+ // Check if Key already exists
+ String dbKeyName = omMetadataManager.getOzoneKey(volumeName, bucketName,
+ keyName);
+ OmKeyInfo dbKeyInfo = omMetadataManager.getKeyTable().get(dbKeyName);
+ if (dbKeyInfo != null) {
+ // Check if this transaction is a replay of ratis logs.
+ if (isReplay(ozoneManager, dbKeyInfo.getUpdateID(),
+ transactionLogIndex)) {
+ // Replay implies the response has already been returned to
+ // the client. So take no further action and return a dummy
+ // OMClientResponse.
+ LOG.debug("Replayed Transaction {} ignored. Request: {}",
+ transactionLogIndex, createKeyRequest);
+ return new OMKeyCreateResponse(createReplayOMResponse(omResponse));
+ }
+ }
+
OmBucketInfo bucketInfo = omMetadataManager.getBucketTable().get(
omMetadataManager.getBucketKey(volumeName, bucketName));
encryptionInfo = getFileEncryptionInfo(ozoneManager, bucketInfo);
- omKeyInfo = prepareKeyInfo(omMetadataManager, keyArgs,
- omMetadataManager.getOzoneKey(volumeName, bucketName, keyName),
+ omKeyInfo = prepareKeyInfo(omMetadataManager, keyArgs, dbKeyName,
keyArgs.getDataSize(), locations, encryptionInfo.orNull(),
ozoneManager.getPrefixManager(), bucketInfo, transactionLogIndex);
- omClientResponse = prepareCreateKeyResponse(keyArgs, omKeyInfo,
- locations, encryptionInfo.orNull(), exception,
+ omClientResponse = prepareCreateKeyResponse(omResponse, keyArgs,
Review comment:
Done.
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