[ovirt-devel] limiting gwt compiler threads to 1

[Einav Cohen]

I could be wrong, but it seems that the default value 
for "gwt.jjs.maxThreads" is 4 [1] - maybe it is not override-able?
in any case, I believe that using:
DEV_EXTRA_BUILD_FLAGS="-Dgwt.compiler.localWorkers=2" (or "1", I guess) 
will help here - see README.developer [2]

----
Thanks,
Einav

[1] http://gerrit.ovirt.org/#/c/25163/2/frontend/webadmin/modules/pom.xml

[2] from README.developer, around line 142:
"""
...
DEV_EXTRA_BUILD_FLAGS
    Any maven build flags requires for building.

    For example, if your machine is low on memory, use:
    DEV_EXTRA_BUILD_FLAGS="-Dgwt.compiler.localWorkers=2"
...
"""

----- Original Message -----
> From: "Greg Sheremeta" <gshereme at redhat.com>
> To: "Vojtech Szocs" <vszocs at redhat.com>, "Alexander Wels" <awels at redhat.com>
> Cc: devel at ovirt.org
> Sent: Wednesday, May 14, 2014 9:09:17 PM
> Subject: [ovirt-devel] limiting gwt compiler threads to 1
> 
> Hi,
> 
> On Fedora 20, I sometimes get GWT compiler crashes due to OutOfMemory. So I
> tried limiting to 1 thread like so:
> 
> make clean install-dev PREFIX=$HOME/ovirt-engine
> DEV_EXTRA_BUILD_FLAGS_GWT_DEFAULTS="-Dgwt.userAgent=gecko1_8,safari"
> BUILD_UT=0 DEV_EXTRA_BUILD_FLAGS="-Dgwt.jjs.maxThreads=1
> -Dgwt.jjs.permutationWorkerFactory=com.google.gwt.dev.ThreadedPermutationWorkerFactory"
> 
> When the two compiler threads spawn, they seem to fire at the same time.
> 
> [INFO]    Compiling 2 permutations
> [INFO]       Compiling permutation 0...
> [INFO]       Compiling permutation 1...
> 
> I would expect there to be a delay while 1 waits for 0:
> 
> [INFO]    Compiling 2 permutations
> [INFO]       Compiling permutation 0...
> <30 second pause...>   <done>
> [INFO]       Compiling permutation 1...
> <30 second pause...>   <done>
> 
> Do I have the options wrong?
> 
> Greg
> 
> Greg Sheremeta
> Red Hat, Inc.
> Sr. Software Engineer, RHEV
> Cell: 919-807-1086
> gshereme at redhat.com
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>