BTrace: General Discussion: BTrace 1.1 Released

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BTrace was started in June 2009, is owned by sundararajana, and has 65 members.

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BTrace 1.1 Released

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4 posts

Replies: 3 - Last Post: January 08, 2010 09:36
by: herrfluff

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Jaroslav Bachorik

Posted: January 06, 2010 15:44 by Jaroslav Bachorik

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Good news, everybody!

A new BTrace release is here - primarily focused on improving
performance of the BTrace core and simplifying the usage of BTrace as a
performance monitoring tool.

===================================================================

Release Notes - btrace - Version release-1.1

New Features

@ProbeClassName and @ProbeMethodName method argument annotations replace the usage of name(BTraceUtil.probeClass()) and BTraceUtil.probeMethod() constructs (brings significant performance improvements)
@Duration method argument annotation gives access to the actual method duration in nanoseconds (there is no need to keep the stack of starting timestamps to be matched at the method exit)
BTraceUtil.timeStamp() method can be used to obtain the current date and time (http://kenai.com/jira/browse/BTRACE-17)
BTraceUtil.writeDOT() method can be used to dump the object graph of a particular instance to DOT file allowing for visualization in GraphViz

Incompatible Changes

@CalledInstance renamed to @TargetInstance as its usage is not bound to Kind.CALL location anymore
@CalledMethod renamed to @TargetMethodOrField as it can be used for fields too and its usage is not bound to Kind.CALL location anymore

Bugs

http://kenai.com/jira/browse/BTRACE-7 - BTraceUtils.field(String, String) fails with CNFE
http://kenai.com/jira/browse/BTRACE-9 - @TLS does not implement ThreadLocalPattern correctly
http://kenai.com/jira/browse/BTRACE-14 - Bind Exception doesn't show up in btrace trace
http://kenai.com/jira/browse/BTRACE-16 - Installing NB plugin to path with space fails
http://kenai.com/jira/browse/BTRACE-19 - @Self parameter does not use supertype matching
http://kenai.com/jira/browse/BTRACE-20 - Ignored multiple probe methods in a script
http://kenai.com/jira/browse/BTRACE-21 - ClassDefNotFoundError while processing Applet class
http://kenai.com/jira/browse/BTRACE-22 - Error in instrumenting using the @Duration annotation
http://kenai.com/jira/browse/BTRACE-23 - Unable to instrument Kind.ENTRY og Kind.CALL
http://kenai.com/jira/browse/BTRACE-24 - Unable to add to or print aggregations
http://kenai.com/jira/browse/BTRACE-28 - java.lang.VerifyError when using a specific script

Improvements

BTraceUtil.printAggregation() now accepts an optional format string (http://kenai.com/jira/browse/BTRACE-26)
BTrace agent supports new argument scriptOutput allowing to specify the script output file (http://kenai.com/jira/browse/BTRACE-27)
VisualVM pluign is able to "guess" the custom classpath used for tracing (http://kenai.com/jira/browse/BTRACE-11)
Multiple probe classes can deployed by the agent and CLI client at once (http://kenai.com/jira/browse/BTRACE-15)

===================================================================

Enjoy!

The BTrace Team

herrfluff

Posted: January 07, 2010 14:05 by herrfluff

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Hi

The first time I invoke Btrace 1.1 on a process everything works perfectly. But when I run BTrace 1.1 the second, third, fourth and so on time against the same process I get the following:

port 2020 not available. exiting

The Java process is listening on that port after the first invocation of BTrace

# netstat -an | grep 2020
      *.2020               *.*                0      0 49152      0 LISTEN

I have no problems runing BTrace version 1.0.2 with the same process and BTrace script.

Am I missing something here?

Configuration: x4270, Solaris 10 u8, Java 1.6 u16

Jaroslav Bachorik	Posted: January 07, 2010 15:44 by Jaroslav Bachorik » Permalink
	Seems as a side-effect of http://kenai.com/jira/browse/BTRACE-14 Will you file a new issue for this problem?

herrfluff	Posted: January 08, 2010 09:36 by herrfluff » Permalink
	Done and done. http://kenai.com/jira/browse/BTRACE-31

Replies: 3 - Last Post: January 08, 2010 09:36
by: herrfluff

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