vicennial commented on code in PR #53233:
URL: https://github.com/apache/spark/pull/53233#discussion_r2565188160
##########
core/src/main/scala/org/apache/spark/executor/Executor.scala:
##########
@@ -212,14 +212,41 @@ private[spark] class Executor(
val defaultSessionState: IsolatedSessionState =
newSessionState(JobArtifactState("default", None))
val isolatedSessionCache: Cache[String, IsolatedSessionState] =
CacheBuilder.newBuilder()
- .maximumSize(100)
+ .maximumSize(conf.get(EXECUTOR_ISOLATED_SESSION_CACHE_SIZE))
.expireAfterAccess(30, TimeUnit.MINUTES)
.removalListener(new RemovalListener[String, IsolatedSessionState]() {
override def onRemoval(
notification: RemovalNotification[String, IsolatedSessionState]):
Unit = {
val state = notification.getValue
// Cache is always used for isolated sessions.
assert(!isDefaultState(state.sessionUUID))
+ // Close classloaders to release resources.
+ try {
+ state.replClassLoader match {
+ case urlClassLoader: URLClassLoader =>
+ urlClassLoader.close()
+ logInfo(log"Closed replClassLoader (URLClassLoader) for evicted
session " +
+ log"${MDC(SESSION_ID, state.sessionUUID)}")
+ case _ =>
+ }
+ } catch {
+ case NonFatal(e) =>
+ logWarning(log"Failed to close replClassLoader for session " +
+ log"${MDC(SESSION_ID, state.sessionUUID)}", e)
+ }
Review Comment:
I believe this is redundant since, for isolated sessions, the
`replClassLoader` is always set to `ExecutorClassLoader`
[here](https://github.com/apache/spark/blob/53ad810087fa6b1564af4092a74c87ee45c23885/core/src/main/scala/org/apache/spark/executor/Executor.scala#L1203)
(and thus, never hits the match case) since the URI is always set
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