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HDFS-7223. Tracing span description of IPC client is too long (iwasakims via cmccabe) 

(cherry picked from commit 5b56ac4c72)
This commit is contained in:
Colin Patrick Mccabe 2014-10-23 19:14:00 -07:00
parent c99d89f2c6
commit caa658a015
5 changed files with 31 additions and 11 deletions
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4
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufRpcEngine.java
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@ -212,9 +212,7 @@ public class ProtobufRpcEngine implements RpcEngine {
// guard it in the if statement to make sure there isn't
// any extra string manipulation.
if (Trace.isTracing()) {
traceScope = Trace.startSpan(
method.getDeclaringClass().getCanonicalName() +
"." + method.getName());
traceScope = Trace.startSpan(RpcClientUtil.methodToTraceString(method));
}
RequestHeaderProto rpcRequestHeader = constructRpcRequestHeader(method);

21
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RpcClientUtil.java
View File

@ -189,4 +189,25 @@ public class RpcClientUtil {
.getProtocolMetaInfoProxy(inv.getConnectionId(), conf,
NetUtils.getDefaultSocketFactory(conf)).getProxy();
}
/**
* Convert an RPC method to a string.
* The format we want is 'MethodOuterClassShortName#methodName'.
*
* For example, if the method is:
* org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.
* ClientNamenodeProtocol.BlockingInterface.getServerDefaults
*
* the format we want is:
* ClientNamenodeProtocol#getServerDefaults
*/
public static String methodToTraceString(Method method) {
Class<?> clazz = method.getDeclaringClass();
while (true) {
Class<?> next = clazz.getEnclosingClass();
if (next == null || next.getEnclosingClass() == null) break;
clazz = next;
}
return clazz.getSimpleName() + "#" + method.getName();
}
}

4
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/WritableRpcEngine.java
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@ -235,9 +235,7 @@ public class WritableRpcEngine implements RpcEngine {
}
TraceScope traceScope = null;
if (Trace.isTracing()) {
traceScope = Trace.startSpan(
method.getDeclaringClass().getCanonicalName() +
"." + method.getName());
traceScope = Trace.startSpan(RpcClientUtil.methodToTraceString(method));
}
ObjectWritable value;
try {

3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -44,6 +44,9 @@ Release 2.7.0 - UNRELEASED
HDFS-7257. Add the time of last HA state transition to NN's /jmx page.
(Charles Lamb via wheat9)
HDFS-7223. Tracing span description of IPC client is too long (iwasakims
via cmccabe)
OPTIMIZATIONS
BUG FIXES

10
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tracing/TestTracing.java
View File

@ -83,15 +83,15 @@ public class TestTracing {
String[] expectedSpanNames = {
"testWriteTraceHooks",
"org.apache.hadoop.hdfs.protocol.ClientProtocol.create",
"org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol.BlockingInterface.create",
"ClientNamenodeProtocol#create",
"org.apache.hadoop.hdfs.protocol.ClientProtocol.fsync",
"org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol.BlockingInterface.fsync",
"ClientNamenodeProtocol#fsync",
"org.apache.hadoop.hdfs.protocol.ClientProtocol.complete",
"org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol.BlockingInterface.complete",
"ClientNamenodeProtocol#complete",
"DFSOutputStream",
"OpWriteBlockProto",
"org.apache.hadoop.hdfs.protocol.ClientProtocol.addBlock",
"org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol.BlockingInterface.addBlock"
"ClientNamenodeProtocol#addBlock"
};
assertSpanNamesFound(expectedSpanNames);
@ -162,7 +162,7 @@ public class TestTracing {
String[] expectedSpanNames = {
"testReadTraceHooks",
"org.apache.hadoop.hdfs.protocol.ClientProtocol.getBlockLocations",
"org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol.BlockingInterface.getBlockLocations",
"ClientNamenodeProtocol#getBlockLocations",
"OpReadBlockProto"
};
assertSpanNamesFound(expectedSpanNames);