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https://issues.apache.org/jira/browse/HADOOP-19450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17927725#comment-17927725
]
ASF GitHub Bot commented on HADOOP-19450:
-----------------------------------------
bhattmanish98 commented on code in PR #7364:
URL: https://github.com/apache/hadoop/pull/7364#discussion_r1958018325
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsDfsClient.java:
##########
@@ -402,11 +406,32 @@ public AbfsRestOperation createPath(final String path,
if (!op.hasResult()) {
throw ex;
}
- if (!isFile && op.getResult().getStatusCode() ==
HttpURLConnection.HTTP_CONFLICT) {
- String existingResource =
- op.getResult().getResponseHeader(X_MS_EXISTING_RESOURCE_TYPE);
- if (existingResource != null && existingResource.equals(DIRECTORY)) {
- return op; //don't throw ex on mkdirs for existing directory
+ if (!isFile) {
+ if (op.getResult().getStatusCode() == HttpURLConnection.HTTP_CONFLICT)
{
+ String existingResource =
+ op.getResult().getResponseHeader(X_MS_EXISTING_RESOURCE_TYPE);
+ if (existingResource != null && existingResource.equals(DIRECTORY)) {
+ return op; //don't throw ex on mkdirs for existing directory
+ }
+ }
+ } else {
+ // recovery using client transaction id only if it is a retried
request.
+ if (op.isARetriedRequest() && clientTransactionId != null
+ && (op.getResult().getStatusCode() ==
HttpURLConnection.HTTP_CONFLICT
+ || op.getResult().getStatusCode() ==
HttpURLConnection.HTTP_PRECON_FAILED)) {
+ try {
+ final AbfsHttpOperation getPathStatusOp =
+ getPathStatus(path, false,
+ tracingContext, null).getResult();
+ if (clientTransactionId.equals(
+ getPathStatusOp.getResponseHeader(
+ X_MS_CLIENT_TRANSACTION_ID))) {
+ return op;
+ }
+ } catch (AzureBlobFileSystemException ignored) {
+ // In case of get path status failure,
Review Comment:
Yes, in case we get exception on getPathStatus, we are raising original
exception.
> [ABFS] Rename/Create path idempotency client-level resolution
> -------------------------------------------------------------
>
> Key: HADOOP-19450
> URL: https://issues.apache.org/jira/browse/HADOOP-19450
> Project: Hadoop Common
> Issue Type: Task
> Components: fs/azure
> Affects Versions: 3.5.0
> Reporter: Manish Bhatt
> Assignee: Manish Bhatt
> Priority: Major
> Labels: pull-request-available
>
> CreatePath and RenamePath APIs are idempotent as subsequent retries on same
> resource don’t change the server state. However, when client experiences
> connection break on the CreatePath and the RenamePath APIs, client cannot
> make sense if the request is accepted by the server or not.
> On connection failure, the client retries the request. The server might
> return 404 (sourceNotFound) in case of RenamePath API and 409
> (pathAlreadyExists) in case of CreatePath (overwrite=false) API. Now the
> client doesn’t have a path forward. Reason being, in case of CreatePath,
> client doesn’t know if the path was created on the original request or the
> path was already there for some other request, in case of RenamePath, client
> doesn’t know if the source was removed because of the original-try or it was
> not there on the first place.
>
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