Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via incubator-accumulo-user by Jason Trost, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkEntries(FilesystemAlterationObserverImpl.java:317)	at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkAndNotify(FilesystemAlterationObserverImpl.java:331)	at org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor.run(AccumuloFilesystemAlterationMonitor.java:121)	at java.lang.Thread.run(Thread.java:722)