@Test
public void testDeadlock() throws Exception {
LuceneTestCase.assumeFalse(
"This test fails on UNIX with Turkish default locale (https://issues.apache.org/jira/browse/LUCENE-6036)",
new Locale("tr").getLanguage().equals(Locale.getDefault().getLanguage()));
// pick random codec names for stress test in separate process:
final Random rnd = RandomizedContext.current().getRandom();
Set<String> avail;
final String codecName =
new ArrayList<>(avail = Codec.availableCodecs()).get(rnd.nextInt(avail.size()));
final String pfName =
new ArrayList<>(avail = PostingsFormat.availablePostingsFormats())
.get(rnd.nextInt(avail.size()));
final String dvfName =
new ArrayList<>(avail = DocValuesFormat.availableDocValuesFormats())
.get(rnd.nextInt(avail.size()));
// spawn separate JVM:
final Process p =
new ProcessBuilder(
Paths.get(System.getProperty("java.home"), "bin", "java").toString(),
"-cp",
System.getProperty("java.class.path"),
getClass().getName(),
codecName,
pfName,
dvfName)
.inheritIO()
.start();
final ScheduledExecutorService scheduler =
Executors.newSingleThreadScheduledExecutor(new NamedThreadFactory("processKiller"));
final ScheduledFuture<?> f =
scheduler.schedule(
new Runnable() {
@Override
public void run() {
p.destroy();
}
},
30,
TimeUnit.SECONDS);
try {
final int exitCode = p.waitFor();
if (f.cancel(false)) {
assertEquals("Process died abnormally", 0, exitCode);
} else {
fail("Process did not exit after 30 secs -> classloader deadlock?");
}
} finally {
scheduler.shutdown();
while (!scheduler.awaitTermination(1, TimeUnit.MINUTES)) ;
}
}
/**
* Check codec restrictions.
*
* @throws AssumptionViolatedException if the class does not work with a given codec.
*/
private void checkCodecRestrictions(Codec codec) {
assumeFalse(
"Class not allowed to use codec: " + codec.getName() + ".",
shouldAvoidCodec(codec.getName()));
if (codec instanceof RandomCodec && !avoidCodecs.isEmpty()) {
for (String name : ((RandomCodec) codec).formatNames) {
assumeFalse(
"Class not allowed to use postings format: " + name + ".", shouldAvoidCodec(name));
}
}
PostingsFormat pf = codec.postingsFormat();
assumeFalse(
"Class not allowed to use postings format: " + pf.getName() + ".",
shouldAvoidCodec(pf.getName()));
assumeFalse(
"Class not allowed to use postings format: " + LuceneTestCase.TEST_POSTINGSFORMAT + ".",
shouldAvoidCodec(LuceneTestCase.TEST_POSTINGSFORMAT));
}