[lttng-dev] Problem in finding Jar file of LTTng for adding to Java project

MMM e.morovati at yahoo.com
Tue Oct 17 15:42:39 UTC 2017 

 I checked all libraries which are listed in result of "ldd /usr/bin/lttng"  command. Non of them are exit in /usr/local/lib. At present, I am going to reinstall my Ubuntu and check the status of my problem in the new Ubuntu. Could you please let me know which method for installing LTTng is better? from source or from PPA?
Regards,Mehdi.
    On Monday, October 16, 2017, 7:14:48 PM GMT+3:30, Philippe Proulx <eeppeliteloop at gmail.com> wrote:  
 
 On Mon, Oct 16, 2017 at 8:13 AM, Alexandre Montplaisir
<alexmonthy at voxpopuli.im> wrote:
>
>
>
> On 2017-10-14 06:18 PM, MMM wrote:
> >  I installed LTTng from source at first. While after that, I also reinstall it from PPA. Is it the cause of my problem?
>
> Perhaps! Having a second installation in parallel is a common source of
> errors, because a binary from a given version may try to link with a
> library from another one.

I doubt that, because Automake sets explicit rpaths when installing.

The default install prefix for the PPA packages is /usr while the
default install prefix (unless you set it explicitly with --prefix at
configuration time) when you build from source is /usr/local. Unless
you're messing with LD_LIBRARY_PATH which takes precedence over the
binary's rpath, there's no conflict.

Phil

>
> Make sure you don't have any LTTng-related binaries or libraries in
> /usr/local/bin, /usr/local/lib, /usr/local/share/java, etc.
> You can also check the output of "ldd /usr/bin/lttng" and make sure only
> libraries from /usr/lib are listed, and not /usr/local/lib.
>
> Cheers,
> Alex
>
> >    On Friday, October 13, 2017, 11:57:33 PM GMT+3:30, Alexandre Montplaisir <alexmonthy at voxpopuli.im> wrote:
> >
> >  On 2017-10-12 03:38 PM, MMM wrote:
> >> Dear Alex,
> >>
> >> As I mentioned, I used sample examples. for instance, I used mentioned
> >> simple program that you told tracing it return some result. While, I
> >> can not receive any result from tracing it. Also, I use Ubuntu 16.04
> >> LTS and lttng 2.9.5. Besides, the output of asked command is
> >>
> >> //////////////////
> >> -rw-r--r-- 1 root root 40871 Jun 16 13:56
> >> /usr/share/java/lttng-ust-agent-common-2.9.1.jar
> >> lrwxrwxrwx 1 root root    32 Jun 16 13:56
> >> /usr/share/java/lttng-ust-agent-common.jar ->
> >> lttng-ust-agent-common-2.9.1.jar
> >> -rw-r--r-- 1 root root  4369 Jun 16 13:56
> >> /usr/share/java/lttng-ust-agent-jul-2.9.1.jar
> >> lrwxrwxrwx 1 root root    29 Jun 16 13:56
> >> /usr/share/java/lttng-ust-agent-jul.jar -> lttng-ust-agent-jul-2.9.1.jar
> >> -rw-r--r-- 1 root root  3933 Jun 16 13:56
> >> /usr/share/java/lttng-ust-agent-log4j-2.9.1.jar
> >> lrwxrwxrwx 1 root root    31 Jun 16 13:56
> >> /usr/share/java/lttng-ust-agent-log4j.jar ->
> >> lttng-ust-agent-log4j-2.9.1.jar
> >> ////////////////////////////
> > Everything seems to be in order here.
> >
> > I will try your exact same environment to see if I can reproduce the issue.
> > How did you install your LTTng 2.9? Was it from source, or from a PPA?
> > The Ubuntu 16.04 main archive only has 2.7.*
> >
> > Cheers,
> > Alex
> >
> >> Thanks for your attention.
> >> Regards,
> >> Mehdi.
> >>
> >> On Thursday, October 12, 2017, 6:51:12 PM GMT+3:30, Alexandre
> >> Montplaisir <alexmonthy at voxpopuli.im> wrote:
> >>
> >>
> >>
> >>
> >> On 2017-10-11 06:05 PM, MMM wrote:
> >>> Dear Alex,
> >>>
> >>> Thanks for your attention. I executed your commands step by step.
> >>> While, again I received previous errors which are
> >>>
> >>> [error] Cannot open any trace for reading.
> >>> [error] opening trace "[path]/lttng-traces/auto-20171011-145947" for
> >>> reading.
> >>> [error] none of the specified trace paths could be opened.
> >>>
> >>> I do not know the reason of this problem. Could you please help me to
> >>> resolve it?
> >> As Philippe mentioned previously, this means the trace is empty, so no
> >> events were produced by the session.
> >>
> >> Did any of the other commands (java, javac, lttng create,...) output any
> >> error messages?
> >>
> >>
> >> Finally, it would help if you could specify:
> >> - What version of Ubuntu you are running
> >>
> >> - What version of LTTng you are running ("lttng --version")
> >>
> >> - The output of the following command:
> >> $ ls -l /usr/share/java/lttng-ust*
> >>
> >> Thanks,
> >> Alex
> >>
> >>> Regards,
> >>> Mehdi.
> >>>
> >>>
> >>>
> >>>
> >>> On Wednesday, October 11, 2017, 6:09:41 PM GMT+3:30, Alexandre
> >>> Montplaisir <alexmonthy at voxpopuli.im
> >> <mailto:alexmonthy at voxpopuli.im>> wrote:
> >>>
> >>> Hi,
> >>>
> >>> I tried compiling and running your program, and it runs fine on my end.
> >>> Here is what I did:
> >>>
> >>> saved the snippet below to "Hello.java"
> >>> $ apt install liblttng-ust-agent-java
> >>> $ javac -cp /usr/share/java/lttng-ust-agent-jul.jar Hello.java
> >>>
> >>> $ lttng create
> >>> $ lttng enable-event -a -j
> >>> $ lttng start
> >>> $ java -cp /usr/share/java/lttng-ust-agent-jul.jar:. Hello
> >>> $ lttng stop
> >>> $ lttng view
> >>>
> >>> and I get the following output:
> >>> Trace directory: /home/alexandre/lttng-traces/auto-20171011-102431
> >>>
> >>> [10:24:49.326824061] (+?.?????????) calista lttng_jul:event: { cpu_id =
> >>> 2 }, { msg = "Hello World, the answer is 42", logger_name = "hello",
> >>> class_name = "Hello", method_name = "main", long_millis = 1507731889299,
> >>> int_loglevel = 800, int_threadid = 1 }
> >>>
> >>>
> >>> Make sure you are setting the -classpath/-cp option correctly, this
> >>> could explain the "unknown package" error you were getting.
> >>>
> >>> Also note that you are using the deprecated "LTTngAgent.getLTTngAgent()"
> >>> API (the "javac" command should warn about it). It should still work,
> >>> but it's highly recommended to use the new API, as described in
> >>> https://lttng.org/docs/v2.10/#doc-jul
> >>> <https://lttng.org/docs/v2.10/#doc-jul%20>. Basically you have to
> >>> instantiate an "LttngLogHandler", and attach it to your Logger.
> >>>
> >>> HTH,
> >>> Alex
> >>>
> >>>
> >>> On 2017-10-10 04:12 PM, MMM via lttng-dev wrote:
> >>>> Dear Philippe,
> >>>>
> >>>> Thanks a lot for your consideration. I solved former problem. While, I
> >>>> faced with a new problem. Indeed, when I create a LTTng session, start
> >>>> it and finally stop LTTng, I could not find trace files in mentioned
> >>>> folder. My java code is
> >>>>
> >>>> ///////////////////////////////////////
> >>>> import java.io.IOException;
> >>>> import java.util.logging.Handler;
> >>>> import java.util.logging.Logger;
> >>>>
> >>>> import org.lttng.ust.agent.LTTngAgent;
> >>>> import org.lttng.ust.agent.jul.LttngLogHandler;
> >>>>
> >>>> public class Hello {
> >>>> private static final int answer = 42;
> >>>> private static LTTngAgent lttngAgent;
> >>>>
> >>>> public static void main(String[] args) throws InterruptedException {
> >>>> Logger helloLog = Logger.getLogger("hello");
> >>>> lttngAgent = LTTngAgent.getLTTngAgent();
> >>>>
> >>>> Thread.sleep(5000);
> >>>> helloLog.info("Hello World, the answer is " + answer);
> >>>> lttngAgent.dispose();
> >>>> }
> >>>>
> >>>> }
> >>>> ///////////////////////
> >>>>
> >>>> Also, I used following LTTng commands.
> >>>>
> >>>> ////////////////////////////////
> >>>> lttng create java-test
> >>>> lttng enable-event -a -l
> >>>> lttng start
> >>>> ///Start My java Application///
> >>>> lttng stop
> >>>> ////////////////////////////
> >>>>
> >>>> Besides, when I used "lttng view" after stopping LTTng, I received
> >>>> following error message
> >>>>
> >>>> [error] Cannot open any trace for reading.
> >>>> [error] opening trace
> >>>> "/[path]/lttng-traces/java-test10-20171010-130909" for reading.
> >>>> [error] none of the specified trace paths could be opened.
> >>>>
> >>>> Could you please help me to resolve it.
> >>>>
> >>>> Regards,
> >>>> Mehdi.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> On Monday, October 9, 2017, 1:05:59 AM GMT+3:30, Philippe Proulx
> >>>> <eeppeliteloop at gmail.com <mailto:eeppeliteloop at gmail.com>
> >> <mailto:eeppeliteloop at gmail.com <mailto:eeppeliteloop at gmail.com>>> wrote:
> >>>>
> >>>> On Sun, Oct 8, 2017 at 4:15 PM, MMM via lttng-dev
> >>>> <lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>
> >> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>>
> >>> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>
> >> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>>>>
> >>> wrote:
> >>>>> Dear Users,
> >>>>>
> >>>>> I am beginner in tracing using LTTng. At present, I am going to
> >>>> trace a java
> >>>>> program in  Ubuntu, while I faced with a problem. When I install
> >>>> LTTng on
> >>>>> Ubuntu, I also install
> >>>>>
> >>>>> "liblttng-ust-agent-java" by "apt-get install
> >> liblttng-ust-agent-java"
> >>>>> command in Ubuntu. But, when I want to import any libraries related
> >>>> to LTTng
> >>>>> such as
> >>>> "org.lttng.ust.agent.jul.LttngLogHandlerorg.lttng.ust.LTTngAgent" to
> >>>>> my program, it is marked as unknown package. Indeed, I could not
> >>>> find LTTng
> >>>>> Jar file for adding it to my program libraries. Furthermore, I
> >>>> searched in
> >>>>> all files and folders, while I could not find Jar file. Could you
> >>> please
> >>>>> help me to understand the cause of this problem and solve it.
> >>>> I'm not a Ubuntu specialist, but from
> >>>>
> >> <https://packages.ubuntu.com/zesty/all/liblttng-ust-agent-java/filelist>,
> >>>> I would say:
> >>>>
> >>>> * /usr/share/java/lttng-ust-agent-jul.jar
> >>>> * /usr/share/java/lttng-ust-agent-log4j.jar
> >>>>
> >>>> On 16.04, it's:
> >>>>
> >>>> * /usr/share/java/liblttng-ust-agent.jar
> >>>>
> >>>> Add the required JAR file to your classpath.
> >>>>
> >>>> Have a look at <http://lttng.org/docs/v2.9/#doc-java-application>.
> >>>>
> >>>> Phil
> >>>>
> >>>>
> >>>>>
> >>>>> Best regards,
> >>>>>
> >>>>> Mehdi.
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> lttng-dev mailing list
> >>>>> lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>
> >> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>>
> >>> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>
> >> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>>>
> >>>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> >>>>
> >>>> _______________________________________________
> >>>> lttng-dev mailing list
> >>>> lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>
> >> <mailto:lttng-dev at lists.lttng.org <mailto:lttng-dev at lists.lttng.org>>
> >>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> >
>
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