mxm commented on a change in pull request #11108: [BEAM-9490] Guard referencing
for environment expiration via a lock
URL: https://github.com/apache/beam/pull/11108#discussion_r392583334
##########
File path:
runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/control/DefaultJobBundleFactory.java
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@@ -406,8 +438,16 @@ public RemoteBundle getBundle(
availableCachesSemaphore.acquire();
// The blocking queue of caches for serving multiple bundles
concurrently.
currentCache = availableCaches.take();
- client = currentCache.getUnchecked(executableStage.getEnvironment());
- client.ref();
+ // Lock because the environment expiration can remove the ref for the
client
+ // which would close the underlying environment before we can ref it.
+ Lock refLock = environmentCacheLocks.get(environmentIndex);
Review comment:
Thanks for spotting this!
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