Logstash 6.4.2 stopped processing after 45 days

Logstash 6.4.2 stopped processing after 45 days.. But the status of logstash shows still active and running. After restarting that, it started receiving the logs from Filebeat 6.4.2 version. We have persistent queues in place. This is a production system, so there is no limitations on space, memory and cpu..

Not much of any useful logs also. Did anyone face similar issue? This raises a concern of reliability..

Are you sending data to Elasticsearch? If so, is there anything in the Elasticsearch logs? Are you perhaps running low on disk space so Elasticsearch can not allocate any new shards?

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