/**
* Unregisters a finished or aborted task.
*
* @param id the ID of the task to be unregistered
*/
private void unregisterTask(final ExecutionVertexID id) {
// Task de-registration must be atomic
synchronized (this) {
final Task task = this.runningTasks.remove(id);
if (task == null) {
LOG.error("Cannot find task with ID " + id + " to unregister");
return;
}
// remove the local tmp file for unregistered tasks.
for (Entry<String, DistributedCacheEntry> e :
DistributedCache.readFileInfoFromConfig(task.getEnvironment().getJobConfiguration())) {
this.fileCache.deleteTmpFile(e.getKey(), e.getValue(), task.getJobID());
}
// Unregister task from the byte buffered channel manager
this.channelManager.unregister(id, task);
// Unregister task from profiling
task.unregisterProfiler(this.profiler);
// Unregister task from memory manager
task.unregisterMemoryManager(this.memoryManager);
// Unregister task from library cache manager
try {
LibraryCacheManager.unregister(task.getJobID());
} catch (IOException e) {
if (LOG.isDebugEnabled()) {
LOG.debug("Unregistering the job vertex ID " + id + " caused an IOException");
}
}
}
}
