Since e6045c6593 the cached executor
services maximum pool size is limited to concurrencyLevel (was
previously Integer.MAX_VALUE). In order to prevent
RejectExecutionException we need to use an queue which max size is
greater than 1 (i.e. nont an SynchronousQueue).
Connection closed with error java.util.concurrent.RejectedExecutionException: Task org.jivesoftware.smack.tcp.XMPPTCPConnection$2@41dce200 rejected from java.util.concurrent.ThreadPoolExecutor@41d59150[Running, pool size = 3, active threads = 3, queued tasks = 0, completed tasks = 4]
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1339)
at org.jivesoftware.smack.AbstractXMPPConnection.asyncGo(AbstractXMPPConnection.java:1583)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.processHandledCount(XMPPTCPConnection.java:1655)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.access$2300(XMPPTCPConnection.java:137)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPConnection.java:1083)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$200(XMPPTCPConnection.java:896)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnection.java:911)
at java.lang.Thread.run(Thread.java:841)
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