PQ80782: A NullPointerException or
ConcurrentModificationException is thrown
Downloadable files
Abstract
A NullPointerException or ConcurrentModificationException
is thrown from either the SelectionManager or PMIManager during very heavy
workloads.
Download Description
Under heavy workloads, a NullPointerException or
ConcurrentModificationException is thrown from a WeakHashmap object in the
Workload Management code. The exception may look something like this:
Root exception is java.util.ConcurrentModificationException:
concurrent access to HashMap attempted by Thread Thread-7,5,
at java.util.HashMap.onExit(HashMap.java:175)
at java.util.HashMap.rehash(HashMap.java:347)
at java.util.HashMap.put(HashMap.java:418)
at java.util.WeakHashMap.put(WeakHashMap.java:298)
at com.ibm.ws.wlm.client.selection.SelectionManager.pushServerForInvocat
at com.ibm.ws.wlm.client.selection.SelectionManager.getTarget(SelectionM
...
...
Prerequisites
Please download the UpdateInstaller below to install this fix.