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Harden DeleteReplicaTest 

* tighten assertions related to type of watcher that should be removed

* use waitForActiveCollection before deleting collections to work around SOLR-13616 and/or SOLR-13627
This commit is contained in:
Chris Hostetter 2019-07-13 08:02:49 -07:00
parent aab166d830
commit 7ddba3b712
2 changed files with 58 additions and 12 deletions
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3
solr/core/src/java/org/apache/solr/cloud/ZkController.java
View File

@ -2545,7 +2545,8 @@ public class ZkController implements Closeable {
};
}
private class UnloadCoreOnDeletedWatcher implements DocCollectionWatcher {
/** @lucene.internal */
class UnloadCoreOnDeletedWatcher implements DocCollectionWatcher {
String coreNodeName;
String shard;
String coreName;

67
solr/core/src/test/org/apache/solr/cloud/DeleteReplicaTest.java
View File

@ -100,7 +100,11 @@ public class DeleteReplicaTest extends SolrCloudTestCase {
DocCollection state = getCollectionState(collectionName);
Slice shard = getRandomShard(state);
Replica replica = getRandomReplica(shard, (r) -> r.getState() == Replica.State.ACTIVE);
// don't choose the leader to shutdown, it just complicates things unneccessarily
Replica replica = getRandomReplica(shard, (r) ->
( r.getState() == Replica.State.ACTIVE &&
! r.equals(shard.getLeader())));
CoreStatus coreStatus = getCoreStatus(replica);
Path dataDir = Paths.get(coreStatus.getDataDirectory());
@ -115,15 +119,27 @@ public class DeleteReplicaTest extends SolrCloudTestCase {
JettySolrRunner replicaJetty = cluster.getReplicaJetty(replica);
ZkStateReaderAccessor accessor = new ZkStateReaderAccessor(replicaJetty.getCoreContainer().getZkController().getZkStateReader());
Set<DocCollectionWatcher> watchers = accessor.getStateWatchers(collectionName);
final long preDeleteWatcherCount = countUnloadCoreOnDeletedWatchers
(accessor.getStateWatchers(collectionName));
CollectionAdminRequest.deleteReplica(collectionName, shard.getName(), replica.getName())
.process(cluster.getSolrClient());
waitForState("Expected replica " + replica.getName() + " to have been removed", collectionName, (n, c) -> {
Slice testShard = c.getSlice(shard.getName());
return testShard.getReplica(replica.getName()) == null;
});
// the core no longer watch collection state since it was removed
assertEquals(watchers.size() - 1, accessor.getStateWatchers(collectionName).size());
// the core should no longer have a watch collection state since it was removed
// the core should no longer have a watch collection state since it was removed
TimeOut timeOut = new TimeOut(60, TimeUnit.SECONDS, TimeSource.NANO_TIME);
timeOut.waitFor("Waiting for core's watcher to be removed", () -> {
final long postDeleteWatcherCount = countUnloadCoreOnDeletedWatchers
(accessor.getStateWatchers(collectionName));
log.info("preDeleteWatcherCount={} vs postDeleteWatcherCount={}",
preDeleteWatcherCount, postDeleteWatcherCount);
return (preDeleteWatcherCount - 1L == postDeleteWatcherCount);
});
assertFalse("Data directory for " + replica.getName() + " should have been removed", Files.exists(dataDir));
@ -217,11 +233,20 @@ public class DeleteReplicaTest extends SolrCloudTestCase {
cluster.getSolrClient().add(collectionName, new SolrInputDocument("id", "2"));
cluster.getSolrClient().commit(collectionName);
cluster.waitForActiveCollection(collectionName, 1, 3);
Slice shard = getCollectionState(collectionName).getSlice("shard1");
Replica replica = getRandomReplica(shard);
// don't choose the leader to shutdown, it just complicates things unneccessarily
Replica replica = getRandomReplica(shard, (r) ->
( r.getState() == Replica.State.ACTIVE &&
! r.equals(shard.getLeader())));
JettySolrRunner replicaJetty = cluster.getReplicaJetty(replica);
ZkStateReaderAccessor accessor = new ZkStateReaderAccessor(replicaJetty.getCoreContainer().getZkController().getZkStateReader());
Set<DocCollectionWatcher> watchers = accessor.getStateWatchers(collectionName);
final long preDeleteWatcherCount = countUnloadCoreOnDeletedWatchers
(accessor.getStateWatchers(collectionName));
ZkNodeProps m = new ZkNodeProps(
Overseer.QUEUE_OPERATION, OverseerAction.DELETECORE.toLower(),
@ -240,12 +265,17 @@ public class DeleteReplicaTest extends SolrCloudTestCase {
timeOut.waitFor("Waiting for replica get unloaded", () ->
replicaJetty.getCoreContainer().getCoreDescriptor(replica.getCoreName()) == null
);
// the core no longer watch collection state since it was removed
// the core should no longer have a watch collection state since it was removed
timeOut = new TimeOut(60, TimeUnit.SECONDS, TimeSource.NANO_TIME);
timeOut.waitFor("Waiting for watcher get removed", () ->
watchers.size() - 1 == accessor.getStateWatchers(collectionName).size()
);
timeOut.waitFor("Waiting for core's watcher to be removed", () -> {
final long postDeleteWatcherCount = countUnloadCoreOnDeletedWatchers
(accessor.getStateWatchers(collectionName));
log.info("preDeleteWatcherCount={} vs postDeleteWatcherCount={}",
preDeleteWatcherCount, postDeleteWatcherCount);
return (preDeleteWatcherCount - 1L == postDeleteWatcherCount);
});
CollectionAdminRequest.deleteCollection(collectionName).process(cluster.getSolrClient());
}
@ -380,6 +410,7 @@ public class DeleteReplicaTest extends SolrCloudTestCase {
});
leaderJetty.start();
cluster.waitForActiveCollection(collectionName, 1, 2);
CollectionAdminRequest.deleteCollection(collectionName).process(cluster.getSolrClient());
}
@ -440,5 +471,19 @@ public class DeleteReplicaTest extends SolrCloudTestCase {
throw e;
}
}
/**
* Helper method for counting the number of instances of <code>UnloadCoreOnDeletedWatcher</code>
* that exist on a given node.
*
* This is useful for verifying that deleting a replica correctly removed it's watchers.
*
* (Note: tests should not assert specific values, since multiple replicas may exist on the same
* node. Instead tests should only assert that the number of watchers has decreased by 1 per known
* replica removed)
*/
private static final long countUnloadCoreOnDeletedWatchers(final Set<DocCollectionWatcher> watchers) {
return watchers.stream().filter(w -> w instanceof ZkController.UnloadCoreOnDeletedWatcher).count();
}
}