Insertion time out error in Couchbase from springboot

Question

Unable To save identifier IN COUCHBASE, identifier: identifiertail::123::459, , Details: com.couchbase.client.core.error.AmbiguousTimeoutException: 
 UpsertRequest, Reason: TIMEOUT 
 "scope":"_default","type":"kv"},"timeoutMs":30000,"timings":{"encodingMicros":102,"totalMicros":36987410}}
    at com.couchbase.client.core.msg.BaseRequest.cancel(BaseRequest.java:163)
    at com.couchbase.client.core.Timer.lambda$register$2(Timer.java:157)
    at com.couchbase.client.core.deps.io.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:672)
    at com.couchbase.client.core.deps.io.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:747)
    at com.couchbase.client.core.deps.io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:472)
    at com.couchbase.client.core.deps.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.lang.Thread.run(Thread.java:748)

Got above error while inserting records from app in logs. But when I checked the file, it was inserted and errors stopped coming after restart of Pods.

What could be reason that got fixed with the Pod restart?

Few things to add to this:

• Couchbase cluster was healthy.
• Network connectivity was good.
• spring boot version: 4.1
• Couchbase: 6.0.3
• connect timeout: 60s

Thanks Ritz