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https://issues.apache.org/jira/browse/HBASE-14451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15049340#comment-15049340
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stack edited comment on HBASE-14451 at 12/10/15 12:53 AM:
----------------------------------------------------------
Giving up on this for the moment. I am not sending traces so need to do more
debug. Fixed a bunch of NPEs because there was not tracer in the particular
context but it doesn't seem like we are generating any spans at the moment post
redo to fit the htrace-4 semantic.
I was running with htrace DEBUG on and with following config:
{code}
24 <property>
25 <name>hbase.htrace.span.receiver.classes</name>
26 <value>org.apache.htrace.impl.HTracedSpanReceiver</value>
27 <description>
28 The class name of the HTrace SpanReceivers to use inside
29 HBase. If there are no class names supplied here, tracings will not
30 be emitted.
31 </description>
32 </property>
33 <property>
34 <name>
35 hbase.htrace.htraced.receiver.address
36 </name>
37 <value>localhost:9075</value>
38 </property>
39 <property>
40 <name>
41 hbase.htraced.error.log.period.ms
42 </name>
43 <value>1000</value>
44 </property>
45 <property>
46 <name>hbase.htrace.sampler.classes</name>
47 <value>org.apache.htrace.core.AlwaysSampler</value>
48 <description>Sampler to use when tracing. Default is
49 org.apache.htrace.core.NeverSampler. Other options are
50 org.apache.htrace.core.AlwaysSampler and
51 org.apache.htrace.core.ProbabilitySampler. See htrace-core
52 for options provided by htrace.
53 </description>
54 </property>
{code}
Attached is latest patch.
was (Author: stack):
Giving up on this for the moment. I am not sending traces so need to do more
debug. Fixed a bunch of NPEs because there was not tracer in the particular
context but it doesn't seem like we are generating any spans at the moment post
redo to fit the htrace-4 semantic.
I was running with htrace DEBUG on and with following config:
{code}
+ <property>
+ <name>hbase.htrace.htraced.span.receiver.classes</name>
+ <value>org.apache.htrace.impl.HTracedSpanReceiver</value>
+ <description>
+ The class name of the HTrace SpanReceivers to use inside
+ HBase. If there are no class names supplied here, tracings will not be
emitted.
+ </description>
+ </property>
+ <property>
+ <name>
+ hbase.htrace.htraced.receiver.address
+ </name>
+ <property>
+ localhost:9075
+ </property>
+ </property>
+ <property>
+ <name>
+ hbase.htraced.error.log.period.ms
+ </name>
+ <property>
+ 1000
+ </property>
+ </property>
+ <property>
+ <name>hbase.htrace.sampler.classes</name>
+ <value>org.apache.htrace.core.AlwaysSampler</value>
+ <description>Sampler to use when tracing. Default is
+ org.apache.htrace.core.NeverSampler. Other options are
+ org.apache.htrace.core.AlwaysSampler and
+ org.apache.htrace.core.ProbabilitySampler. See htrace-core
+ for options provided by htrace.
+ </description>
+ </property>
{code}
Attached is latest patch.
> Move on to htrace-4.0.1 (from htrace-3.2.0)
> -------------------------------------------
>
> Key: HBASE-14451
> URL: https://issues.apache.org/jira/browse/HBASE-14451
> Project: HBase
> Issue Type: Task
> Reporter: stack
> Assignee: stack
> Attachments: 14451.txt, 14451.v10.txt, 14451.v10.txt, 14451v11.patch,
> 14451v13.txt, 14451v2.txt, 14451v3.txt, 14451v4.txt, 14451v5.txt,
> 14451v6.txt, 14451v7.txt, 14451v8.txt, 14451v9.txt, 14551v12.patch
>
>
> htrace-4.0.0 was just release with a new API. Get up on it.
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