com.couchbase.client.core.RequestCancelledException: Request cancelled in-flight

Hi Couchbase Team,
We are facing the same issue on our production Couchbase 4.6.3 running N1QL query with Java SDK 2.1. Is there any work around until we upgrade our SDK to 2.4.7? Since its our production system, we cannot immediately upgrade SDK. Here are the logs for reference:

Application logs:
com.couchbase.client.core.RequestCancelledException: Request cancelled in-flight.
at com.couchbase.client.core.endpoint.AbstractGenericHandler.handleOutstandingOperations(AbstractGenericHandler.java:281) ~[core-io-1.1.3.jar:1.1.3]
at com.couchbase.client.core.endpoint.AbstractGenericHandler.exceptionCaught(AbstractGenericHandler.java:253) ~[core-io-1.1.3.jar:1.1.3]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:246) ~[core-io-1.1.3.jar:1.1.3]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:224) ~[core-io-1.1.3.jar:1.1.3]
at com.couchbase.client.deps.io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:131) ~[core-io-1.1.3.jar:1.1.3]
at com.couchbase.client.deps.io.netty.channel.CombinedChannelDuplexHandler.exceptionCaught(CombinedChannelDuplexHandler.java:137) ~[core-io-1.1.3.jar:1.1.3]

Couchbase logs:
Service ‘query’ exited with status 1. Restarting. Messages: runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:2232 +0x1 fp=0xc20932ffe8 sp=0xc20932ffe0
created by github.com/couchbase/indexing/secondary/queryport/n1ql.func·007
/home/couchbase/jenkins/workspace/watson-unix/goproj/src/github.com/couchbase/indexing/secondary/queryport/n1ql/secondary_index.go:867 +0xcfe
[goport] 2017/09/28 10:12:38 /opt/couchbase/bin/cbq-engine terminated: signal: aborted