ableegoldman commented on a change in pull request #10342:
URL: https://github.com/apache/kafka/pull/10342#discussion_r604366210



##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/StateDirectory.java
##########
@@ -444,22 +408,30 @@ public synchronized void clean() {
      * Remove the directories for any {@link TaskId}s that are no-longer
      * owned by this {@link StreamThread} and aren't locked by either
      * another process or another {@link StreamThread}
-     * @param cleanupDelayMs only remove directories if they haven't been 
modified for at least
-     *                       this amount of time (milliseconds)
+     * @param cleanupDelayMs        only remove directories if they haven't 
been modified for at least
+     *                              this amount of time (milliseconds)
+     * @param currentThreadNames    the names of all non-DEAD stream threads 
so we can clean up any
+     *                              orphaned task directories
      */
-    public synchronized void cleanRemovedTasks(final long cleanupDelayMs) {
+    public synchronized void cleanRemovedTasks(final long cleanupDelayMs, 
final Set<String> currentThreadNames) {
         try {
-            cleanRemovedTasksCalledByCleanerThread(cleanupDelayMs);
+            cleanRemovedTasksCalledByCleanerThread(cleanupDelayMs, 
currentThreadNames);
         } catch (final Exception cannotHappen) {
             throw new IllegalStateException("Should have swallowed 
exception.", cannotHappen);
         }
     }
 
-    private void cleanRemovedTasksCalledByCleanerThread(final long 
cleanupDelayMs) {
+    private void cleanRemovedTasksCalledByCleanerThread(final long 
cleanupDelayMs, final Set<String> currentThreadNames) {
         for (final File taskDir : listNonEmptyTaskDirectories()) {
             final String dirName = taskDir.getName();
             final TaskId id = TaskId.parse(dirName);
-            if (!locks.containsKey(id)) {
+
+            final String owningThread = lockedTasksToStreamThreadOwner.get(id);
+            if (owningThread != null && 
!currentThreadNames.contains(owningThread)) {
+                log.warn("Deleting lock for task directory {} since the thread 
owning the lock is gone: {}", id, owningThread);

Review comment:
       Ok actually I decided to do this in a separate PR, to keep this from 
creeping scope and to unblock this while I work on adding tests for 
KAFKA-10563. Reverted these changes from this PR for now




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