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https://issues.apache.org/jira/browse/HDFS-16764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17641934#comment-17641934
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ASF GitHub Bot commented on HDFS-16764:
---------------------------------------
ZanderXu commented on code in PR #4872:
URL: https://github.com/apache/hadoop/pull/4872#discussion_r1037138461
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
##########
@@ -3095,12 +3095,12 @@ LocatedBlock getAdditionalDatanode(String src, long
fileId,
final byte storagePolicyID;
final List<DatanodeStorageInfo> chosen;
final BlockType blockType;
- checkOperation(OperationCategory.READ);
+ checkOperation(OperationCategory.WRITE);
final FSPermissionChecker pc = getPermissionChecker();
FSPermissionChecker.setOperationType(null);
readLock();
try {
- checkOperation(OperationCategory.READ);
+ checkOperation(OperationCategory.WRITE);
Review Comment:
Sir, sorry for the late update. Please help me review it again, thanks.
> ObserverNamenode handles addBlock rpc and throws a FileNotFoundException
> -------------------------------------------------------------------------
>
> Key: HDFS-16764
> URL: https://issues.apache.org/jira/browse/HDFS-16764
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Critical
> Labels: pull-request-available
>
> ObserverNameNode currently can handle the addBlockLocation RPC, but it may
> throw a FileNotFoundException when it contains stale txid.
> * AddBlock is not a coordinated method, so Observer will not check the
> statId.
> * AddBlock does the validation with checkOperation(OperationCategory.READ)
> So the observer can handle the addBlock rpc. If this observer cannot replay
> the edit of create file, it will throw a FileNotFoundException during doing
> validation.
> The related code as follows:
> {code:java}
> checkOperation(OperationCategory.READ);
> final FSPermissionChecker pc = getPermissionChecker();
> FSPermissionChecker.setOperationType(operationName);
> readLock();
> try {
> checkOperation(OperationCategory.READ);
> r = FSDirWriteFileOp.validateAddBlock(this, pc, src, fileId, clientName,
> previous, onRetryBlock);
> } finally {
> readUnlock(operationName);
> } {code}
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