There is a lot "io.grpc.StatusRuntimeException: CANCELLED: client
cancelled" error in server side.
And occationally, I will get
"io.netty.util.internal.OutOfDirectMemoryError: failed to allocate ***
byte(s) of direct memory (used: ***, max: ***)" error on server side too.
Set "io.netty.leakDetection.level=paranoid", there is no leak related
LOGs.
Server side function looks like this,
@Override
public StreamObserver<CommandRequestProto> send(
StreamObserver<CommandResponseProto> responseObserver) {
return new StreamObserver<CommandRequestProto>() {
@Override
public void onNext(CommandRequestProto request) {
try {
CommandResponseProto resp =
function(request);
responseObserver.onNext(resp);
} catch (Throwable e) {
LOG.error("Got exception when processing"
+ "CommandRequestProto {}", request, e);
responseObserver.onError(e);
}
}
@Override
public void onError(Throwable t) {
// for now we just log a msg
LOG.error("Command send on error. Exception: ", t);
}
@Override
public void onCompleted() {
LOG.debug("Command send completed");
responseObserver.onCompleted();
}
};
My question is SHOULD I call responseObserver.onCompleted() in onError too?
I found there is inconsistent answers on stack overflow,
This one
https://stackoverflow.com/questions/64257725/can-someone-explain-to-me-whats-the-proper-usage-of-grpc-streamobserver-onerror
Says that onError/onCompleted should not call requestObserver.
While this one
https://stackoverflow.com/questions/65488395/grpc-oncomplete-for-bidistream
Says if you don't call requestObserver.onCompleted, there will be a memory
leak.
I'm not sure which one is corrent. I'd like to hear the more authoritative
answer.
Should server side request StreamObserver.onError/onCompleted call
response's StreamObserver.onCompleted?
Thanks in advance.
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