[Bug] dubbo2.7.7 output info when docode lose

[nulinuli-nuli]

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Apache Dubbo Component

Java SDK (apache/dubbo)

Dubbo Version

Dubbo: 2.7.7
Java: 1.8

i want use MonitorFilter,but i found not have output.

output set in here
private void logMessageLength(Object result, int bytes) {
if (bytes > 0) {
if (result instanceof Request) {
try {
((RpcInvocation)((Request)result).getData()).setAttachment("input", String.valueOf(bytes));
} catch (Throwable var5) {
}
} else if (result instanceof Response) {
try {
((AppResponse)((Response)result).getResult()).setAttachment("output", String.valueOf(bytes));
} catch (Throwable var4) {
}
}

}

}

but when after this, output is lose
private void decode(Object message) {
if (message instanceof Decodeable) {
try {
((Decodeable)message).decode();
if (log.isDebugEnabled()) {
log.debug("Decode decodeable message " + message.getClass().getName());
}
} catch (Throwable var3) {
Throwable e = var3;
if (log.isWarnEnabled()) {
log.warn("Call Decodeable.decode failed: " + e.getMessage(), e);
}
}
}

}

Steps to reproduce this issue

use dubbo 2.7.7 then debug can reproduce ,very easy

What you expected to happen

i cat hava output in this code
private URL createStatisticsUrl(Invoker<?> invoker, Invocation invocation, Result result, String remoteHost, long start, boolean error) {
// ---- service statistics ----
long elapsed = System.currentTimeMillis() - start; // invocation cost
int concurrent = getConcurrent(invoker, invocation).get(); // current concurrent count
String application = invoker.getUrl().getParameter(APPLICATION_KEY);
String service = invoker.getInterface().getName(); // service name
String method = RpcUtils.getMethodName(invocation); // method name
String group = invoker.getUrl().getParameter(GROUP_KEY);
String version = invoker.getUrl().getParameter(VERSION_KEY);

    int localPort;
    String remoteKey, remoteValue;
    if (CONSUMER_SIDE.equals(invoker.getUrl().getParameter(SIDE_KEY))) {
        // ---- for service consumer ----
        localPort = 0;
        remoteKey = MonitorService.PROVIDER;
        remoteValue = invoker.getUrl().getAddress();
    } else {
        // ---- for service provider ----
        localPort = invoker.getUrl().getPort();
        remoteKey = MonitorService.CONSUMER;
        remoteValue = remoteHost;
    }
    String input = "", output = "";
    if (invocation.getAttachment(INPUT_KEY) != null) {
        input = invocation.getAttachment(INPUT_KEY);
    }
    if (result != null && result.getAttachment(OUTPUT_KEY) != null) {
        output = result.getAttachment(OUTPUT_KEY);
    }

    return new URL(COUNT_PROTOCOL, NetUtils.getLocalHost(), localPort, service + PATH_SEPARATOR + method, MonitorService.APPLICATION, application, MonitorService.INTERFACE, service, MonitorService.METHOD, method, remoteKey, remoteValue, error ? MonitorService.FAILURE : MonitorService.SUCCESS, "1", MonitorService.ELAPSED, String.valueOf(elapsed), MonitorService.CONCURRENT, String.valueOf(concurrent), INPUT_KEY, input, OUTPUT_KEY, output, GROUP_KEY, group, VERSION_KEY, version);
}

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct

[wcy666103]

This version has been archived, and no further code modifications or functional support will be provided.