[Engine-devel] ovirt-engine repo up in gerrit.ovirt.org!

[Itamar Heim]

On 10/31/2011 01:29 PM, Juan Hernandez wrote:
> On 10/31/2011 12:04 PM, Dennis Jacobfeuerborn wrote:
>> On 10/31/2011 09:34 AM, Juan Hernandez wrote:
>>> On 10/31/2011 05:55 AM, Itamar Heim wrote:
>>>> On 10/31/2011 04:52 AM, Dennis Jacobfeuerborn wrote:
>>>>> On 10/31/2011 03:27 AM, Itamar Heim wrote:
>>>>>> On 10/30/2011 04:32 PM, Dennis Jacobfeuerborn wrote:
>>>>>>> Hi Yair,
>>>>>>> I managed to install the two missing dependencies from the web and now
>>>>>>> the build seem to run ok but apparently 8gb of RAM are not sufficient to
>>>>>>> build ovirt-engine so I'll have to give it a pass for now and wait for
>>>>>>> binary releases.
>>>>>>
>>>>>> 8GB are more than enough. probably some config for the JVM.
>>>>>> what's the error you are getting?
>>>>>> did you set the JAVA_OPTS?
>>>>>
>>>>> I don't get an error. The build process simply uses up all memory and
>>>>> the desktop becomes unusable. If I don't switch to another virtual
>>>>> terminal and issue a "killall java" then the system would probably die
>>>>> in the end and require a reboot (or the OOM Killer would step in an kill
>>>>> some processes before that happens).
>>>>>
>>>>> This is a plain Fedora 15 System and I'm following the build
>>>>> instructions from the wiki so right now there are no custom settings
>>>>> applied.
>>>>
>>>> we are all building on F15, and with less than 8GB as well.
>>>> which command are you running causing the hang?
>>>> what does top shows when it hangs?
>>>> what does maven output show when it hangs (i.e., which part of the
>>>> project is causing the hang).
>>>
>>> The compilation of the GWT applications can take very long (more than 10
>>> minutes in a core i5 with 8GB) with intensive use of all the CPUs. This
>>> could be what you are observing. Can try to build without the
>>> "-Pgwt-user" and "-Pgwt-admin" options? Just to check if this is your issue.
>>>
>>
>> This seems to be the problem. I already sent the information to Yair
>> Zaslavsky (and Daniel Erez) who contacted me off-list about this (though I
>> think this really belongs on the list so everybody can chime in).
>> I attached the output I get. At the end I had to kill the process because
>> memory usage was at about 99%.
>>
>> The command I'm running is: mvn install -Pgwt-admin,gwt-user
>> The system monitor shows cpu usage very low (up to the problematic point
>> the build seems to spend 90% of its time trying to download jar files from
>> bogus sources) and memory usage increasing slightly as expected until the
>> build reaches that last problematic part where all cpu cores go to 100% and
>> memory usage increases until all memory is consumed.
>
> All those messages are expected, except the "Destroying process ..." at
> the end. I assume that you get that when you kill the Java processes.
> How long did you wait before killing them? I would suggest that you try
> again and give it time to complete. GWT compiling is extremelly
>
> Also you can reduce the number of permutations generated by the GWT
> compiler and that will reduce the time it takes to compile. For example,
> if you are going to use Firefox only as the client you can apply the
> following patch to reduce the number of permutations to just one:

maybe worth to create target profiles of web admin limited to a single 
browser then? or allow to set this as an evnironment property so
gwt_user.agent=gecko1_8 mvn clean install -Pgwt-admin
can be used for this during devel?

>
> ---
> a/frontend/webadmin/modules/webadmin/src/main/java/org/ovirt/engine/ui/webadmin/WebAdmin.gwt.xml
> +++
> b/frontend/webadmin/modules/webadmin/src/main/java/org/ovirt/engine/ui/webadmin/WebAdmin.gwt.xml
> @@ -19,6 +19,9 @@
>          <set-property name="gwt.logging.logLevel" value="INFO" />
>          <set-property name="gwt.logging.popupHandler" value="DISABLED" />
>
> +<!-- Reduce the number of permutations to compile, just for
> tests: -->
> +<set-property name="user.agent" value="gecko1_8"/>
> +
>          <!-- Inherit oVirt UiCommon Web modules and GWT deRPC module -->
>          <inherits name="org.ovirt.engine.ui.GwtExtension" />
>          <inherits name="org.ovirt.engine.ui.UICommonWeb" />
>
> Then compile with "-Pgwt-admin" only. That will generate the GUI but
> only for Firefox. In my environment (Intel Core i5 8GB) this reduces the
> GWT compilation to 4 minutes:
>
> [INFO] WebAdmin ... SUCCESS [4:22.581s]