I have some problem with groovy. Sometimes when script is executed then exception NullPointerException is thrown but allways when I debugging the script the exception is no occurred. It looks like that my object sometimes is not created in time and Groovy try execute method on it. Someone have idea what could be the reason of problem:
Below is mentioned exception:
Caused by: java.lang.NullPointerException: Cannot invoke method getService() on null object.
Related
Query1 has a method getSelect().
assertTrue(Query1.getSelect().isEmpty());
In the test, I got the java.lang.NullPointerException error.
How can I solve this error?
I am just learning the Junit5 test, not sure how to deal with the NullPointerException error.
I am executing Android unit tests on an emulator using test instrumentation. I have used the TestSuiteInstrumentation class from Xamarin. I am getting below error:
Error : java.lang.NullPointerException: Attempt to invoke virtual
method 'android.content.res.Resources
android.content.Context.getResources()' on a null object reference
Can anyone help me to resolve this.?
I have a global exception handler configured in my environment where i get only the exception stack trace. But now I need to get method signature and an arguments passed to that method where exception has occurred.
Any help is appreciated.
My code is trowing ArrayIndexOutOfBoundsException in a JUnit 4.12 test, I want to stop at that exception when it is thrown, but I can't for some reason.
Here are my debugger settings:
When I run my code with Debug, the exception is just logged to the console, and the debugger won't stop at the line where it has occurred.
What am I doing wrong?
Looks like the only way to stop at exception in a JUnit test is to create an exception breakpoint rule for that exception, because JUnit catches any excepiton that occurred in a test. Here is what I did:
I am getting the following exception when I typo the SQL driver name or the database server is offline, basically any SQLException.
I can't determine where the UndeclaredThrowableException is coming from. Line 194 in SqlMapClientTemplate is this:
logger.debug("Obtained JDBC Connection [" + springCon + "] for iBATIS operation");
Here is the trace:
java.lang.reflect.UndeclaredThrowableException
$Proxy59.toString(Unknown Source)
java.lang.String.valueOf(Unknown Source)
java.lang.StringBuffer.append(Unknown Source)
org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:194)
org.springframework.orm.ibatis.SqlMapClientTemplate.executeWithListResult(SqlMapClientTemplate.java:249)
org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:296)
org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:290)
some of my reading points to some type of class loading problem? I can't figure out where the $Proxy is getting introduced?
The $Proxy59 class must be the type of the springCon variable. It is a JDK proxy type, probably introduced by the Spring framework, as a wrapper for the real connection. I know of a pooled connection provider that returns connections which suppress the close() method via a proxy (because the connection is pooled, calling close is not the client's task).
Maybe the proxy's handler for the toString() method throws a checked exception, which is possible with the proxy mechanics, but not allowed.
The Java Documentation says:
"If a checked exception is thrown by invoke that is not assignable to any of the exception types declared in the throws clause of the interface method, then an UndeclaredThrowableException will be thrown by the method invocation on the proxy instance. The UndeclaredThrowableException will be constructed with the exception that was thrown by the invoke method."
Do you get any other exception logged, maybe directly before that, or mentioned as the exception cause?