madrob commented on a change in pull request #1297: SOLR-14253 Replace various sleep calls with ZK waits
URL: https://github.com/apache/lucene-solr/pull/1297#discussion_r385768968
##########
File path: solr/core/src/java/org/apache/solr/cloud/ZkController.java
##########
@@ -1684,58 +1685,37 @@ private void doGetShardIdAndNodeNameProcess(CoreDescriptor cd) {
}
private void waitForCoreNodeName(CoreDescriptor descriptor) {
- int retryCount = 320;
- log.debug("look for our core node name");
- while (retryCount-- > 0) {
- final DocCollection docCollection = zkStateReader.getClusterState()
- .getCollectionOrNull(descriptor.getCloudDescriptor().getCollectionName());
- if (docCollection != null && docCollection.getSlicesMap() != null) {
- final Map<String, Slice> slicesMap = docCollection.getSlicesMap();
- for (Slice slice : slicesMap.values()) {
- for (Replica replica : slice.getReplicas()) {
- // TODO: for really large clusters, we could 'index' on this
-
- String nodeName = replica.getStr(ZkStateReader.NODE_NAME_PROP);
- String core = replica.getStr(ZkStateReader.CORE_NAME_PROP);
-
- String msgNodeName = getNodeName();
- String msgCore = descriptor.getName();
-
- if (msgNodeName.equals(nodeName) && core.equals(msgCore)) {
- descriptor.getCloudDescriptor()
- .setCoreNodeName(replica.getName());
- getCoreContainer().getCoresLocator().persist(getCoreContainer(), descriptor);
- return;
- }
- }
+ log.debug("waitForCoreNodeName >>> look for our core node name");
+ try {
+ zkStateReader.waitForState(descriptor.getCollectionName(), 320, TimeUnit.SECONDS, c -> {
+ String name = ClusterStateMutator.getAssignedCoreNodeName(c, getNodeName(), descriptor.getName());
+ if (name == null) {
+ return false;
}
- }
- try {
- Thread.sleep(1000);
- } catch (InterruptedException e) {
- Thread.currentThread().interrupt();
- }
+ descriptor.getCloudDescriptor().setCoreNodeName(name);
Review comment:
This thread will block on the wait call, so I don't think we're introducing any new races. It was always possible that two threads could be trying to access the CoreDescriptor, I think.
----------------------------------------------------------------
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:
users@infra.apache.org
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@lucene.apache.org
For additional commands, e-mail: issues-help@lucene.apache.org