Using "synchronized" but still getting IllegalMonitorStateException

From:

laredotornado <laredotornado@zipmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 6 Apr 2009 09:54:47 -0700 (PDT)

Message-ID:

<427b0996-fd78-46a8-8c3b-ea582026c50b@e38g2000vbe.googlegroups.com>

Hi,

I'm trying to execute this bit of JUnit test code (Java 1.5):

    public void testEventLoggerFailure() {
        try {
            synchronized(this) {
                EventLogger el = new EventLogger(null,
                       null,
                       null,
                       null);
                el.start();
                el.wait();
            } // synchronized
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        } // catch
    } // testEventLoggerFailure

but yet, at the "el.wait()" line the below exceptioin is thrown ...

java.lang.IllegalMonitorStateException: current thread not owner
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:474)
    at ConnectionErrorsTest.testEventLoggerFailure
(ConnectionErrorsTest.java:113)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:585)
    at junit.framework.TestCase.runTest(TestCase.java:154)
    at junit.framework.TestCase.runBare(TestCase.java:127)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at junit.framework.TestSuite.runTest(TestSuite.java:208)
    at junit.framework.TestSuite.run(TestSuite.java:203)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run
(JUnitTestRunner.java:297)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch
(JUnitTestRunner.java:672)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main
(JUnitTestRunner.java:567)

Any ideas? Thanks, - Dave