Sergey Zhemzhitsky created CXF-4342:
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Summary: NullPointerException in CachedOutputStream
Key: CXF-4342
URL: https://issues.apache.org/jira/browse/CXF-4342
Project: CXF
Issue Type: Bug
Affects Versions: 2.4.2
Reporter: Sergey Zhemzhitsky
The following error occurs from time to time in the CachedOutputStream
{code}
java.lang.NullPointerException
at
org.apache.cxf.io.CachedOutputStream.maybeDeleteTempFile(CachedOutputStream.java:487)[85:org.apache.cxf.bundle:2.4.2]
at
org.apache.cxf.io.CachedOutputStream.close(CachedOutputStream.java:187)[85:org.apache.cxf.bundle:2.4.2]
at
org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:1561)[85:org.apache.cxf.bundle:2.4.2]
at
org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream$1.run(HTTPConduit.java:1494)[85:org.apache.cxf.bundle:2.4.2]
at
org.apache.cxf.workqueue.AutomaticWorkQueueImpl$2.run(AutomaticWorkQueueImpl.java:353)[85:org.apache.cxf.bundle:2.4.2]
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)[:1.6.0_29]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)[:1.6.0_29]
at java.lang.Thread.run(Thread.java:662)[:1.6.0_29]
{code}
The problem is in the following method
{code}
private void maybeDeleteTempFile(Object stream) {
streamList.remove(stream);
if (!inmem && tempFile != null && streamList.isEmpty() &&
allowDeleteOfFile) {
if (currentStream != null) {
try {
currentStream.close();
postClose();
} catch (Exception e) {
//ignore
}
}
tempFile.delete();
tempFile = null;
currentStream = new LoadingByteArrayOutputStream(1024);
inmem = true;
}
}
{code}
NPE occurs executing the following code *tempFile.delete();*, so we can
conclude that exception is connected with multithreading because before
deleting the file there is a check *tempFile != null*
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