Yes, you are right, sorry, that was I copy-paste mistake form the website, haven't noticed it. In reality I am using AlwawsSampler, in my configuration, 3 slaves, 1 namenode, lxc containers.
On Sat, Aug 27, 2016 at 5:05 PM, Sandeep Khurana <skhurana...@gmail.com> wrote: > Never used any of these. But reading documentation of the links you sent > "NeverSampler: > HTrace is OFF for all spans" . Should you not use either ProbabilitySampler > or AlwaysSampler > > On Sat, Aug 27, 2016 at 7:22 PM, Alexandru Calin < > alexandrucali...@gmail.com> wrote: > >> >> favorite >> <http://stackoverflow.com/questions/39181880/tracing-hadoop-using-htrace-with-zipkin#> >> >> I am trying to use HTrace with Hadoop 2.6.0 on Ubuntu 14.04. I have >> followed Hadoop's HTrace integration tutorial here >> <https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-common/Tracing.html> >> . >> >> I have added the following configuration properties to core-site.xml on >> all nodes ( namenode & datanodes ), as specified in the tutorial: >> >> <property> >> <name>hadoop.htrace.sampler</name> >> <value>NeverSampler</value> >> </property> >> property> >> <name>hadoop.htrace.spanreceiver.classes</name> >> <value>ZipkinSpanReceiver</value> >> </property> >> <property> >> <name>hadoop.htrace.zipkin.collector-hostname</name> >> <value>hadoop-master</value> >> </property> >> <property> >> <name>hadoop.htrace.zipkin.collector-port</name> >> <value>9410</value> >> </property> >> >> I have followed the *Setting up ZipkinSpanReceiver* section, compiled, >> built & copied the libraries: >> >> /usr/local/hadoop/share/hadoop/common/lib/htrace-core-3.0.4.jar >> /usr/local/hadoop/share/hadoop/common/lib/htrace-zipkin-3.0.4-jar-with-dependencies.jar >> >> I have downloaded Zipkin from here <https://github.com/openzipkin/zipkin> and >> started the server running the jar. >> >> I have compiled, the TracingFsShell.java, with some minor modifications >> to including dependencies: >> >> import org.apache.hadoop.conf.Configuration;import >> org.apache.hadoop.fs.FsShell;import >> org.apache.hadoop.tracing.SpanReceiverHost;import >> org.apache.hadoop.util.ToolRunner;import org.htrace.Sampler;import >> org.htrace.Trace;import org.htrace.TraceScope; >> public class TracingFsShell { >> public static void main(String argv[]) throws Exception { >> Configuration conf = new Configuration(); >> FsShell shell = new FsShell(); >> conf.setQuietMode(false); >> shell.setConf(conf); >> SpanReceiverHost.getInstance(conf); >> int res = 0; >> TraceScope ts = null; >> try { >> ts = Trace.startSpan("FsShell", Sampler.ALWAYS); >> res = ToolRunner.run(shell, argv); >> } finally { >> shell.close(); >> if (ts != null) ts.close(); >> } >> System.exit(res); >> }} >> >> The modifications came after I wasn't able to build the example and have >> looked through the classes of the two compiled jars(htrace-core & >> htrace-zipkin). When I run the example, I get nothing in zipkin. >> >> java -cp .:`hadoop classpath` TracingFsShell -ls /Found 1 items >> drwxr-xr-x - hduser supergroup 0 2016-07-02 08:28 /user >> >> Am I missing something? >> > > > > -- > Thanks and regards > Sandeep Khurana >
