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Elasticsearch cluster information currently unavailable (too slow) #953
Some days, the system page of our graylog2 (v0.92.3) shows a red message for the ES cluster status saying
I tried some debugging and here is the API response times from GL and ES:
For some reason graylog takes to much time to get this information. Hot threads during this time does not show any big load on graylog (only 3%), and some ES nodes are doing "Lucene Merge Thread" tasks. It seems to me that ES still responds imediately, so graylog must be the problem here.
I can provide more debugging messages if necessary.
Thank you for reporting this.
Could you please include some logs from the Graylog server when the issue appears? That may help us to better understand the reason for it.
Thank you for your response.
The issue seems to appear in some days, usually is gets back to normal when the index is deflected. We have 30 indices with 20 mil entries each.