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How do I fix IllegalMonitorStateException?
In order to deal with the IllegalMonitorStateException you must verify that all invokations of the wait , notify and notifyAll methods are taking place only when the calling thread owns the appropriate monitor. The most simple solution is to enclose these calls inside synchronized blocks.
What is IllegalMonitorStateException in Java?
java.lang.IllegalMonitorStateException. Thrown to indicate that a thread has attempted to wait on an object’s monitor or to notify other threads waiting on an object’s monitor without owning the specified monitor. See also: Object.
When IllegalMonitorStateException occurs in Java?
When Is It Thrown? The IllegalMonitorStateException is related to multithreading programming in Java. If we have a monitor we want to synchronize on, this exception is thrown to indicate that a thread tried to wait or to notify other threads waiting on that monitor, without owning it.
When the IllegalMonitorStateException will arises?
As described by the official documentation, an IllegalMonitorStateException can occur when a thread attempts to wait on an object’s monitor, or to notify other threads waiting for said object’s monitor, when that thread does not own the monitor in question.
What is illegal thread state exception?
public class IllegalThreadStateException extends IllegalArgumentException. Thrown to indicate that a thread is not in an appropriate state for the requested operation.
What is wait () in java?
Simply put, wait() is an instance method that’s used for thread synchronization. It can be called on any object, as it’s defined right on java. lang. Object, but it can only be called from a synchronized block. It releases the lock on the object so that another thread can jump in and acquire a lock.
What is difference between sleep and wait in java?
The major difference is that wait() releases the lock or monitor while sleep() doesn’t releases the lock or monitor while waiting. wait() is used for inter-thread communication while sleep() is used to introduce pause on execution, generally.
Can we start a dead thread in Java?
Once a thread enters dead state it cannot be restarted.
Why does java.lang.illegalmonitorstateexception throw an exception?
This exception, when thrown, indicates that the calling thread has attempted to wait on an object’s monitor, or has attempted to notify other threads that wait on an object’s monitor, without owning the specified monitor.
What does the illegalmonitorexception mean in JavaScript?
IllegalMonitorException is thrown to indicate that a thread has attempted to wait on an object’s monitor or to notify other threads waiting on an object’s monitor without owning the specified monitor.
Why did I get exception in thread main Java?
Today, while working on Java program I got above java.lang. IllegalMonitorStateException Exception at runtime. There wasn’t any error appeared during compile time. After finishing a complete Java program on threading when I ran the code, suddenly above error popped out.
Is the selenium method the wrong method in Java?
This is a necro, but since there aren’t better answers, and someone else might happen by: you’re calling the wrong method. You probably intended to call the selenium method to wait for a condition: https://selenium.googlecode.com/svn/trunk/docs/api/java/org/openqa/selenium/support/ui/WebDriverWait.html