- waiting to
lock <0x622d9aa8> (a org.ofbiz.entity.GenericValue)
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hi ,
I am getting very high CPU usage. I saw one of the Thread among other
thread's as follow :
"http-0.0.0.0-8080-Processor6" daemon prio=1 tid=0x081e0430 nid=0x706a
runnable [0x3c34f000..0x3c350030]
at java.util.Observable.clearChanged(Observable.java)
- waiting to lock <0x622d9aa8> (a org.ofbiz.entity.GenericValue)
at java.util.Observable.notifyObservers(Observable.java:138)
- locked <0x622d9aa8> (a org.ofbiz.entity.GenericValue)
at org.ofbiz.entity.GenericEntity.set(GenericEntity.java:402)
- locked <0x622d9aa8> (a org.ofbiz.entity.GenericValue)
at org.ofbiz.entity.GenericEntity.setFields(GenericEntity.java:851)
- locked <0x622d9aa8> (a org.ofbiz.entity.GenericValue)
>From above thread dump , Processor6 is waiting for the lock on object which
whose hashvalue is 0x622d9aa8 , but it has already got the lock for this
object. I am not getting why this thread is waiting to acquire lock on
object whom which it has already lock. Above code is executed in Multi
environment , there could be many threads trying to acess the setFields()
function of GenericEntity which is synchronized. setFields() function has
set() method which again
snchronized and at the end it is notifying the observers. That point this
thread is waiting for lock to invoke clearChange() which again synchronized.
It would be nice some one can provide some information that.
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