Couchbase & Spring boot - DefaultOrphanResponseReporter - Orphan responses observed

Question

I'm running a Spring Boot application that has a Couchbase DB. In the application log, I see hundreds of records like that:

[cb-orphan-1] [31mWARN [0;39m [32mc.c.c.c.t.DefaultOrphanResponseReporter[0;39m - Orphan responses observed: [{"top":[{"r":"10.250.17.53:8092","s":"view","c":"13963D4B3G6AFE45/FFFFFFFF8F4D718C","l":"10.123.0.197:36530"}],"service":"view","count":1}

They differ from each other in the c value and they have different IP & port in the l value. There is a time difference of few seconds between each of these log records.

After finding this post that suggested that somewhere else in the application there should be timeouts, I looked in the logs for such but didn't find any timeout errors.

• How can I know what was the query that resulted in that timeout?
• Is there a way to make this warning more verbose?
• What does the "c":"13963D4B3G6AFE45/FFFFFFFF8F4D718C" stands for?

Answer 1

I have a similar problem. The logs show up even if the client stays completely idle.

• the only way I have found to find out what queries were causing those logs was by debugging the application (breakpoint in the DefaultOrphanResponseReporter class). In my case, they were all KeepAlive requests.
• I don't think the warnings can be made more verbose, maybe by providing custom OrphanResponseReporter implementation.
• c stands for last_local_id. According to the documentation (tracing-from-the-sdk.html), it can be used to correlate logs with server-side logs. Unfortunately, I was not able to do it.