RFR: 8062536: [TESTBUG] Conflicting GC combinations in jdk tests

Evgeniya Stepanova evgeniya.stepanova at oracle.com
Thu Nov 6 10:05:48 UTC 2014

Hi David,

tag added because tests contain string

and JpsHelper defines
public static final String[] VM_ARGS = {"-Xmx512m", "-XX:+UseParallelGC"};
public static List<String> getVmArgs() throws IOException {
         if (testVmArgs == null) {
             testVmArgs = new ArrayList<>();
             testVmArgs.add("-XX:Flags=" + 
         return testVmArgs;

Tests itself wouldn't fail if we use another GC, tag added for 
cleanup-if we use for example SerialGC we must be sure that tests passed 
with this GC, not with another one. Now you will assume that concrete 
test passed with Serial GC, but it run only with Parallel GC. Plus there 
is no any sense to run test twice in TC (with different GC, since it use 
only Parallel)

Evgeniya Stepanova
On 06.11.2014 6:20, David Holmes wrote:
> Hi Evgeniya,
> On 6/11/2014 1:33 AM, Evgeniya Stepanova wrote:
>> Hi,
>> Please review changes for 8062536, the OpenJDK/jdk part of the 
>> JDK-8019361
>> bug: https://bugs.openjdk.java.net/browse/JDK-8062536
>> fix: http://cr.openjdk.java.net/~eistepan/8062536/webrev.00/
>> Problem: Some tests explicitly set GC and fail when another GC is set
>> outside
> I don't see why you have done this for the
> test/sun/tools/jps/TestJps*.java
> tests. They don't set any GC flags.
>> Solution: Such tests marked with the jtreg tag "requires" to skip test
>> if there is a conflict
> Just wondering: Does a skipped test get a .jtr file showing it was 
> skipped; or does it only appear in the higher-level jtreg log?
> Thanks,
> David
>> Tested locally with different GC flags (-XX:+UseG1GC,
>> -XX:+UseParallelGC, -XX:+UseSerialGC, -XX:+UseConcMarkSweep and without
>> any GC flag). Tests are being excluded as expected. No tests failed
>> because of the conflict.
>> Thanks,
>> Evgeniya Stepanova
>> //

/Evgeniya Stepanova/
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