shalinmangar commented on a change in pull request #2004:
URL: https://github.com/apache/lucene-solr/pull/2004#discussion_r508473215
##########
File path: solr/core/src/java/org/apache/solr/cloud/ZkController.java
##########
@@ -1838,6 +1838,22 @@ private void checkStateInZk(CoreDescriptor cd) throws
InterruptedException, NotI
}
}
+ public void tryCancelAllElections() {
+ if (zkClient.isClosed()) {
+ return;
+ }
+ electionContexts.values().parallelStream().forEach(context -> {
Review comment:
No, it does not. Parallelstream was being used for close in
ZkController.close() as well so this was basically copied code. However I
checked and it is a lightweight operation. It basically removes a zk node and
sets a volatile member. I have replaced this call with a serial forEach in both
places.
@hossman pointed out that this iteration wasn't safe so I have put the
forEach inside a synchronized block
##########
File path: solr/core/src/java/org/apache/solr/update/SolrCoreState.java
##########
@@ -86,7 +103,45 @@ public boolean decrefSolrCoreState(IndexWriterCloser
closer) {
}
return close;
}
-
+
+ /**
+ * Pauses all update requests to this core and waits (indefinitely) for all
in-flight
+ * update requests to finish
+ */
+ public void pauseUpdatesAndAwaitInflightRequests() {
+ if (pauseUpdateRequests.compareAndSet(false, true)) {
+ inflightUpdatesCounter.register();
+ inflightUpdatesCounter.arriveAndAwaitAdvance();
+ }
+ }
+
+ /**
+ * Unpauses update requests to this core
+ */
+ public void unpauseUpdates() {
Review comment:
Removed
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