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HADOOP-12183. Annotate the HTrace span created by FsShell with the command-line arguments passed by the user (Masatake Iwasaki via Colin P. McCabe)

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This commit is contained in:
Colin Patrick Mccabe 2015-07-31 14:59:42 -07:00
parent 21d10ccc6e
commit 454da959c7
3 changed files with 17 additions and 1 deletions
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4
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -739,6 +739,10 @@ Release 2.8.0 - UNRELEASED
HADOOP-11807. add a lint mode to releasedocmaker (ramtin via aw)
HADOOP-12183. Annotate the HTrace span created by FsShell with the
command-line arguments passed by the user (Masatake Iwasaki via Colin P.
McCabe)
OPTIMIZATIONS
HADOOP-11785. Reduce the number of listStatus operation in distcp

8
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsShell.java
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@ -35,6 +35,7 @@
import org.apache.hadoop.tracing.SpanReceiverHost;
import org.apache.hadoop.tools.TableListing;
import org.apache.hadoop.tracing.TraceUtils;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.htrace.Sampler;
@ -298,6 +299,13 @@ public int run(String argv[]) throws Exception {
throw new UnknownCommandException();
}
TraceScope scope = Trace.startSpan(instance.getCommandName(), traceSampler);
if (scope.getSpan() != null) {
String args = StringUtils.join(" ", argv);
if (args.length() > 2048) {
args = args.substring(0, 2048);
}
scope.getSpan().addKVAnnotation("args", args);
}
try {
exitCode = instance.run(Arrays.copyOfRange(argv, 1, argv.length));
} finally {

6
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFsShell.java
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@ -24,6 +24,7 @@
import org.apache.hadoop.util.ToolRunner;
import org.apache.htrace.SamplerBuilder;
import org.apache.htrace.impl.AlwaysSampler;
import org.junit.Assert;
import org.junit.Test;
public class TestFsShell {
@ -57,10 +58,13 @@ public void testTracing() throws Throwable {
FsShell shell = new FsShell(conf);
int res;
try {
res = ToolRunner.run(shell, new String[]{"-help"});
res = ToolRunner.run(shell, new String[]{"-help", "ls", "cat"});
} finally {
shell.close();
}
SetSpanReceiver.assertSpanNamesFound(new String[]{"help"});
Assert.assertEquals("-help ls cat",
SetSpanReceiver.getMap()
.get("help").get(0).getKVAnnotations().get("args"));
}
}