maobaolong commented on a change in pull request #1228:
URL: https://github.com/apache/hadoop-ozone/pull/1228#discussion_r458516884
##########
File path:
hadoop-ozone/s3gateway/src/main/java/org/apache/hadoop/ozone/s3/endpoint/ObjectEndpoint.java
##########
@@ -562,13 +562,18 @@ private Response createMultipartKey(String bucket, String
key, long length,
OmMultipartCommitUploadPartInfo omMultipartCommitUploadPartInfo =
ozoneOutputStream.getCommitUploadPartInfo();
- String eTag = omMultipartCommitUploadPartInfo.getPartName();
+ if (omMultipartCommitUploadPartInfo != null) {
Review comment:
> Do we know why omMultipartCommitUploadPartInfo is null in this case
As `IOUtils.closeQuietly(ozoneOutputStream)` called in the finally block of
the method createMultipartKey, every IOException has been swallowed by the
closeQuietly, so when closing ozoneOutputStream, maybe there are some exception
occurred.
And the close method of KeyOutputStream, we can see
`blockOutputStreamEntryPool.commitKey` is called here.
```java
public void close() throws IOException {
if (closed) {
return;
}
closed = true;
try {
handleFlushOrClose(StreamAction.CLOSE);
if (!isException) {
Preconditions.checkArgument(writeOffset == offset);
}
blockOutputStreamEntryPool.commitKey(offset);
} finally {
blockOutputStreamEntryPool.cleanup();
}
}
```
Lets guess, if `commitMultipartUploadPart` failed with an IOException,
`commitUploadPartInfo` would be `null`, so the NPE occurred.
```java
void commitKey(long offset) throws IOException {
if (keyArgs != null) {
// in test, this could be null
long length = getKeyLength();
Preconditions.checkArgument(offset == length);
keyArgs.setDataSize(length);
keyArgs.setLocationInfoList(getLocationInfoList());
// When the key is multipart upload part file upload, we should not
// commit the key, as this is not an actual key, this is a just a
// partial key of a large file.
if (keyArgs.getIsMultipartKey()) {
commitUploadPartInfo =
omClient.commitMultipartUploadPart(keyArgs, openID);
} else {
omClient.commitKey(keyArgs, openID);
}
} else {
LOG.warn("Closing KeyOutputStream, but key args is null");
}
}
```
> we should return an proper s3 error code from there.
Sorry, i'm not very familiar with S3, do you have any idea and suggestion
about the return error type
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