There are quite a few test cases in the interactive test suite that cause the system hangs. The current testing configuration is:

Operating system: Solaris 5.5.1/5.5.6
Machine: Sun Sparc 1 or Sun Sparc 2
JCK: JCK-116a
JDK: JDK117b

Here is a short list of the test cases that cause the system hang:

JCK-116a/tests/api/java_awt/interactive/
PMenuTests.java
FontTests.java
ContainerTest.java
ScrollPaneTest.java
FlowLayoutTests.java

How to reproduce:

1) Setup the environment
   setenv JAVA_HOME /net/tapas/export0/jdk117b/solaris
   setenv ALT_JDK $JAVA_HOME
   setenv CLASSPATH /net/tapas/export0/JCK-116a/javatest.jar
   set path = ($JAVA_HOME/bin $path)
2) Start one of the tests from the list above, for example FontTests.class
3) The test case will bring up a window that display the string and allow the
   user to select various things from the menu.
   I selected 80 as the font point size with Bold and Italic style.
4) In the last pop-up menu, there are many options for a user to select such as
   Font encoding, Font height, etc.. I played around with the selections for a
   few times and the system just hang.
5) Following is the output of the log file:

   #Test Results
#Wed Jun 24 14:33:14 PDT 1998
ObjectID=interactive Class
testsuite=/net/tapas/export0/JCK-116a/tests/testsuite.html
source=FontTests.java
executeClass=javasoft.sqe.tests.api.java.awt.interactive.FontTests
title=Font interactive test
status=Failed. 1 out of 1 tests failed. First test that failed is interactive0005
work=/net/tapas/export2/results/117b/b7conway116ajdk_interactive/api/java_awt/interactive/
execStatus=Failed. 1 out of 1 tests failed. First test that failed is interactive0005
description=file:/net/tapas/export0/JCK-116a/tests/api/java_awt/interactive/manual.html#Font
id=Font
name=Font
sections=testExecute testExecute
harnessVersion=JT_2.0_c
file=/net/tapas/export0/JCK-116a/tests/api/java_awt/interactive/manual.html
end=Wed Jun 24 14:33:14 PDT 1998
start=Wed Jun 24 14:31:36 PDT 1998
keywords=compile execute positive coreAPI awt interactive
environment=jck-runtime-otherJVM-solaris
executeArgs=-TestCaseID ALL

test: api/java_awt/interactive/manual.html#Font
script: javasoft.sqe.javatest.lib.JCKScript -runtime
Executing test class...
command: javasoft.sqe.javatest.lib.ExecJCKTestOtherJVMCmd CLASSPATH=/net/tapas/export0/JCK-116a/tests/../classes:/net/tapas/export0/JCK-116a/javatest.jar DISPLAY=conway:0.0 HOME=/home/jbui LD_LIBRARY_PATH=/net/tapas/export0/JCK-116a/tests/../lib:/net/tapas/export0/JCK-116a/tests/../lib_solaris: /net/tapas/export0/jdk117b/solaris/bin/java -verify javasoft.sqe.tests.api.java.awt.interactive.FontTests -TestCaseID ALL
----------ref:testExecute(0/0)----------
----------log:testExecute(2/131)----------
interactive0005: Failed. No response from user.
STATUS:Failed. 1 out of 1 tests failed. First test that failed is interactive0005
command result: Failed. 1 out of 1 tests failed. First test that failed is interactive0005
test result: Failed. 1 out of 1 tests failed. First test that failed is interactive0005