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51adbb9920
they fail to acquire a lock This will ensure that the queue item gets re-queued and the worker is put to sleep, rather than thrashing on retries
57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
import logging
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import time
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import features
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from app import namespace_gc_queue, all_queues
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from data import model
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from workers.queueworker import QueueWorker, WorkerSleepException
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from util.log import logfile_path
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from util.locking import GlobalLock, LockNotAcquiredException
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logger = logging.getLogger(__name__)
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POLL_PERIOD_SECONDS = 60
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NAMESPACE_GC_TIMEOUT = 60 * 60 # 60 minutes
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LOCK_TIMEOUT_PADDING = 60 # seconds
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class NamespaceGCWorker(QueueWorker):
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"""
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Worker which cleans up namespaces enqueued to be GCed.
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"""
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def process_queue_item(self, job_details):
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try:
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with GlobalLock(
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"LARGE_GARBAGE_COLLECTION", lock_ttl=NAMESPACE_GC_TIMEOUT + LOCK_TIMEOUT_PADDING
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):
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self._perform_gc(job_details)
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except LockNotAcquiredException:
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logger.debug("Could not acquire global lock for garbage collection")
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raise WorkerSleepException
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def _perform_gc(self, job_details):
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logger.debug("Got namespace GC queue item: %s", job_details)
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marker_id = job_details["marker_id"]
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if not model.user.delete_namespace_via_marker(marker_id, all_queues):
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raise Exception("GC interrupted; will retry")
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if __name__ == "__main__":
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logging.config.fileConfig(logfile_path(debug=False), disable_existing_loggers=False)
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if not features.NAMESPACE_GARBAGE_COLLECTION:
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logger.debug("Namespace garbage collection is disabled; skipping")
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while True:
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time.sleep(100000)
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logger.debug("Starting namespace GC worker")
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worker = NamespaceGCWorker(
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namespace_gc_queue,
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poll_period_seconds=POLL_PERIOD_SECONDS,
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reservation_seconds=NAMESPACE_GC_TIMEOUT,
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)
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worker.start()
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