anmolanmol1234 commented on code in PR #4039:
URL: https://github.com/apache/hadoop/pull/4039#discussion_r1057110694
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsClient.java:
##########
@@ -681,35 +685,36 @@ public AbfsRestOperation append(final String path, final
byte[] buffer,
abfsUriQueryBuilder, cachedSasToken);
final URL url = createRequestUrl(path, abfsUriQueryBuilder.toString());
- final AbfsRestOperation op = new AbfsRestOperation(
- AbfsRestOperationType.Append,
- this,
- HTTP_METHOD_PUT,
- url,
- requestHeaders,
- buffer,
- reqParams.getoffset(),
- reqParams.getLength(),
- sasTokenForReuse);
+ final AbfsRestOperation op =
getAbfsRestOperationForAppend(AbfsRestOperationType.Append,
+ HTTP_METHOD_PUT, url, requestHeaders, buffer, reqParams.getoffset(),
+ reqParams.getLength(), sasTokenForReuse);
try {
op.execute(tracingContext);
} catch (AzureBlobFileSystemException e) {
+ // If the http response code indicates a user error we retry
+ // the same append request with expect header disabled.
+ // When "100-continue" header is enabled but a non Http 100 response
comes,
+ // JDK fails to provide all response headers.
Review Comment:
Today in some places, devs have taken dependency on the response message
being sent by the server for the further processing in code. In case if server
doesn't send a response of 100-continue, client has not sent the payload and
hence the response message may be null in some cases. So to make sure that
backward compatibility is not hindered, we are retrying the request failed with
user errors without expect header being enabled.
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