Intermittent failure of sun/awt/image/ImageFetcher/ManyAnimatedGifsTest/ManyAnimatedGifsTest.java

Looking over nightly tests results for a period of a couple of months
I saw this (closed) test fail 3 times on Solaris on 3/3, 3/21 and 4/15
I doubt there is anything Solaris specific about the failure, more likely
that the machine environment is just more likely to produce this
intermittent failure.

All but one of the test logs have been purged, so the only log I can
paste here is from a failure on 15th April :

jib > Total number of images: 5
jib > Processing image 1
jib > Processing image 2
jib > Processing image 2
jib > Processing image 4
jib > Processing image 3
jib > The test has FAILED. Only 4 were processed
jib > STDERR:
jib > java.lang.RuntimeException: The test has failed: Only 4 were processed.
jib > at ManyAnimatedGifsTest.main(ManyAnimatedGifsTest.java:43)
jib > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
jib > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
jib > at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
jib > at java.base/java.lang.reflect.Method.invoke(Method.java:567)
jib > at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
jib > at java.base/java.lang.Thread.run(Thread.java:835)
jib >
jib > JavaTest Message: Test threw exception: java.lang.RuntimeException: The test has failed: Only 4 were processed.
jib > JavaTest Message: shutting down test