ba55f370a9
This has triggered an OOM in a process which was churning through s3a fs instances; the increased memory footprint of IOStatistics amplified what must have been a long-standing issue with FS instances being created and not closed() * Makes sure instrumentation is closed when the FS is closed. * Uses a weak reference from metrics to instrumentation, so even if the FS wasn't closed (see HADOOP-18478), this back reference would not cause the S3AInstrumentation reference to be retained. * If S3AFileSystem is configured to log at TRACE it will log the calling stack of initialize(), so help identify where the instance is being created. This should help track down the cause of instance leakage. Contributed by Steve Loughran. |
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