provide remove global lock 

-bash-3.00$ grep addTimerTask /tmp/dump13.txt
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)
	at org.postgresql.Driver.addTimerTask(Driver.java:769)