Multiple Sigar_port.exe are Creating in task manager

Couchbase Server
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Multiple Sigar_port.exe are Creating in task manager. which leads to high memory utilization of CPU.
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Index failure exception has encountered.
error: com.couchbase.client.core.error.IndexFailureException: The server reported an issue with the underlying index {“completed”:true,“coreId”:“0x35daed4a00000002”,“errors”:[{“code”:12003,“message”:"Keyspace not found in CB datastore keyspace config - cause: CBAuth database is stale: last reason: dial tcp 127.0.0.1:8091: connectex: No connection could be made because the target machine actively refused

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Apologies for the delay here, this looks most likely that you have something else running on one of the ports that Couchbase is trying to bind to and so it can’t start-up properly and is repeatedly trying to.

What version of Couchbase Server are you running? I believe we have improved this behaviour