[SOLR-7573] Inconsistent numbers of docs between leader and replica

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 4.10.3
• Assignee: Erick Erickson
• Reporter: Erick Erickson
• Created: 19/May/15 19:48
• Updated: 20/Jan/16 22:02
• Resolved: 20/Jan/16 22:02

Description

Once again assigning to myself to keep track. And once again not reproducible at will and possible related to firehosing updates to Solr.

Saw a situation where things seemed to be indexed normally, but the number of docs on a leader and follower were not the same. The leader had, as I remember, a 4.5G index and the follower a 1.9G index. No errors in the logs, no recovery initiated, etc. All nodes green.

The very curious thing was that when the follower was bounced, it did a full index replication from the leader. How that could be happening without the follower ever going into a recovery state I have no idea.

Again, if I can get this to reproduce locally I can put more diagnostics into the process and see what I can see. I also have some logs to further explore.

Issue Links

• is related to: SOLR-7333 Make the poll queue time configurable and use knowledge that a batch is being processed to poll efficiently
• is related to: SOLR-7572 hard commits with waitSearcher=true occasionally returns without waiting leading to inconsistent views of the index.
• is related to: SOLR-7571 Return metrics with update requests to allow clients to self-throttle
• relates to: SOLR-7572 hard commits with waitSearcher=true occasionally returns without waiting leading to inconsistent views of the index.
• relates to: SOLR-7571 Return metrics with update requests to allow clients to self-throttle