snehavarma commented on a change in pull request #1925:
URL: https://github.com/apache/hadoop/pull/1925#discussion_r595327566
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystemStore.java
##########
@@ -702,15 +735,72 @@ public OutputStream openFileForWrite(final Path path,
final FileSystem.Statistic
isAppendBlob = true;
}
+ SelfRenewingLease lease = maybeCreateLease(relativePath);
+
return new AbfsOutputStream(
client,
statistics,
relativePath,
offset,
- populateAbfsOutputStreamContext(isAppendBlob));
+ populateAbfsOutputStreamContext(isAppendBlob, lease));
}
}
+ /**
+ * Acquire a lease on an ABFS file for a specified duration. This requires
the file to exist.
+ *
+ * @param path file name
+ * @param duration time lease will be held before expiring
+ * @return the acquired lease ID
+ * @throws AzureBlobFileSystemException on any exception while acquiring the
lease
+ */
+ public String acquireLease(final Path path, final int duration) throws
AzureBlobFileSystemException {
+ LOG.debug("lease path: {}", path);
+
+ final AbfsRestOperation op =
+ client.acquireLease(getRelativePath(path), duration);
+
+ return
op.getResult().getResponseHeader(HttpHeaderConfigurations.X_MS_LEASE_ID);
+ }
+
+ /**
Review comment:
Yes if the file is being created then infinite lease can be
automatically taken, for other cases yes you may need the acquire lease code
till we integrate bundling of lease with append.
RenewLease code might be something you can completely get rid of
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