[infinispan-dev] concurrency issue on ServiceLoader::iterator
Anyone ever seen this error?
Caused by: java.util.NoSuchElementException
at java.util.AbstractList$Itr.next(AbstractList.java:350) [classes.jar:1.6.0_31]
at java.util.Collections$1.nextElement(Collections.java:3389) [classes.jar:1.6.0_31]
at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:332)
[classes.jar:1.6.0_31]
at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:415) [classes.jar:1.6.0_31]
at
org.infinispan.distexec.spi.DistributedTaskLifecycleService.onPreExecute(DistributedTaskLifecycleService.java:50)
[infinispan-core-5.2.0-SNAPSHOT.jar:5.2.0-SNAPSHOT]
public <T> void onPreExecute(Callable<T> task) {
try {
Iterator<DistributedTaskLifecycle> i = loader.iterator();
while (i.hasNext()) { // <------------------------------------------------- we
CHECK before
DistributedTaskLifecycle cl = i.next();
cl.onPreExecute(task);
And I doubt I have multiple thread accessing it at the same time -- running this from
serial testsuite.
I can reproduce this, atm, almost every time, where Vladimir (Blagojevic; Infinispan -
author of DistributedTaskLifecycleService) cannot.
Any idea?
-Ales