xiaoyuyao commented on a change in pull request #28: HDDS-1569 Support creating
multiple pipelines with same datanode
URL: https://github.com/apache/hadoop-ozone/pull/28#discussion_r338324469
##########
File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/states/Node2PipelineMap.java
##########
@@ -71,6 +71,10 @@ public synchronized void addPipeline(Pipeline pipeline) {
UUID dnId = details.getUuid();
dn2ObjectMap.computeIfAbsent(dnId, k -> ConcurrentHashMap.newKeySet())
.add(pipeline.getId());
+ dn2ObjectMap.computeIfPresent(dnId, (k, v) -> {
+ v.add(pipeline.getId());
Review comment:
Correct me if I'm wrong, dn2ObjectMap.computeIfAbsent(dnId, k ->
ConcurrentHashMap.newKeySet()) ensures for a dnId we will have a KeySet().
Then the returned value (KeySet) allows line 73 to continue the operation to
add pipeline id with a .add(pipeline.getId).
JDK document can be found here:
https://docs.oracle.com/javase/8/docs/api/java/util/Map.html#computeIfAbsent-K-java.util.function.Function-
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
