AndreyBozhko commented on code in PR #2707:
URL: https://github.com/apache/solr/pull/2707#discussion_r1755442168
##########
solr/core/src/java/org/apache/solr/schema/ZkIndexSchemaReader.java:
##########
@@ -145,6 +145,10 @@ public void process(WatchedEvent event) {
log.warn("ZooKeeper watch triggered, but Solr cannot talk to ZK");
return;
}
+ if (e.code() == KeeperException.Code.NONODE) {
+ log.warn("ZooKeeper watch triggered, but schema does not exist in ZK
- skipping update");
+ return;
+ }
Review Comment:
Test failure:
```
> com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured
an uncaught exception in thread: Thread[id=402, name=zkCallback-144-thread-2,
state=RUNNABLE, group=TGRP-TestCloudConsistency]
> at
__randomizedtesting.SeedInfo.seed([C86BB29C87FB4A74:B680928C449C454E]:0)
>
> Caused by:
> org.apache.solr.common.cloud.ZooKeeperException:
> at __randomizedtesting.SeedInfo.seed([C86BB29C87FB4A74]:0)
> at
app//org.apache.solr.schema.ZkIndexSchemaReader$SchemaWatcher.process(ZkIndexSchemaReader.java:149)
> at
app//org.apache.solr.common.cloud.SolrZkClient$ProcessWatchWithExecutor.lambda$process$1(SolrZkClient.java:1083)
> at
app//org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$1(ExecutorUtil.java:449)
> at
java.base@21.0.4/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
> at
java.base@21.0.4/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
> at java.base@21.0.4/java.lang.Thread.run(Thread.java:1583)
>
> Caused by:
> org.apache.zookeeper.KeeperException$NoNodeException:
KeeperErrorCode = NoNode for
/configs/outOfSyncReplicasCannotBecomeLeader-false.AUTOCREATED/managed-schema.xml
> at
app//org.apache.zookeeper.KeeperException.create(KeeperException.java:117)
> at
app//org.apache.zookeeper.KeeperException.create(KeeperException.java:53)
> at
app//org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1972)
> at
app//org.apache.solr.common.cloud.SolrZkClient.lambda$getData$6(SolrZkClient.java:448)
> at
app//org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:70)
> at
app//org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:448)
> at
app//org.apache.solr.schema.ZkIndexSchemaReader.updateSchema(ZkIndexSchemaReader.java:176)
> at
app//org.apache.solr.schema.ZkIndexSchemaReader$SchemaWatcher.process(ZkIndexSchemaReader.java:141)
> ... 5 more
Reproduce with: ./gradlew :solr:core:test --tests
"org.apache.solr.cloud.TestCloudConsistency.testOutOfSyncReplicasCannotBecomeLeader"
-Ptests.jvms=6 "-Ptests.jvmargs=-XX:TieredStopAtLevel=1 -XX:+UseParallelGC
-XX:ActiveProcessorCount=1 -XX:ReservedCodeCacheSize=120m"
-Ptests.seed=985B588C69AC93B2 -Ptests.file.encoding=ISO-8859-1
```
##########
solr/core/src/java/org/apache/solr/schema/ZkIndexSchemaReader.java:
##########
@@ -145,6 +145,10 @@ public void process(WatchedEvent event) {
log.warn("ZooKeeper watch triggered, but Solr cannot talk to ZK");
return;
}
+ if (e.code() == KeeperException.Code.NONODE) {
+ log.warn("ZooKeeper watch triggered, but schema does not exist in ZK
- skipping update");
+ return;
+ }
Review Comment:
Updated the watcher logic to handle situation when the schema node was
deleted.
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