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http://issues.apache.org/bugzilla/show_bug.cgi?id=32573 Summary: NPE: map.LRUMap.reuseMapping(LRUMap.java:272) Product: Commons Version: 3.1 Platform: PC OS/Version: Linux Status: NEW Severity: normal Priority: P2 Component: Collections AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] I'm using Collections 3.1 and just found this NPE in my logs: java.lang.NullPointerException at org.apache.commons.collections.map.LRUMap.reuseMapping(LRUMap.java:272) at org.apache.commons.collections.map.LRUMap.addMapping(LRUMap.java:243) at org.apache.commons.collections.map.AbstractHashedMap.put(AbstractHashedMap.java:282) I instantiated LRUMap like this: LRUMap map = new LRUMap(31); And from there on, I use it like I'd use any Map, putting things into it, and so on. Maybe I'm not using LRUMap correctly? My _guess_ is that this occurs when the Map is full, but I am not certain. I am wrapping the LRUMap in my own Maps as follows, but I think they're not the culprit: LRUMap map = new LRUMap(31); _userSessions = new ExpiringMap(map, new TimerTTLReferenceHolder(1800000), // ttl=30min 300000); // purge frequency=5min The only similar thing I found is bug 28887, but it looks like that was fixed before 3.1 release. I understand the value of a self-contained unit test that demonstrates this bug, but it happens only occassionally on my production system, never during development, so I can't really come up with it :( My guess is that this is a boundary case, as line 272 is: loop = loop.next; So 'loop' is most likely null, and it's null because ... not sure, maybe that hashIndex is wrong. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
