Category Archives: Java

Debugging Hibernate using Log4J Logs

Posted on August 20, 2010 by nitingautam

People who work with Hibernate often want to see, what SQL it is prepairing behind the seen and how it is mapping in real for debug purpose. We can achieve this by enable log4j for Hibernate classes. This will give … Continue reading →

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java.security.NoSuchAlgorithmException: No implementation for AES/CBC/NoPadding found

Posted on December 17, 2009 by nitingautam

Hi, From past few days I and my few team members were getting the following error during LDAP authentication: javax.net.ssl.SSLException: Algorithm missing:       at com.sun.net.ssl.internal.ssl.SSLSocketImpl.f(DashoA12275)     at com.sun.net.ssl.internal.ssl.SunJSSE_ax.a(DashoA12275)     at com.sun.net.ssl.internal.ssl.SunJSSE_az.j(DashoA12275)     at com.sun.net.ssl.internal.ssl.SunJSSE_az.a(DashoA12275)     at com.sun.net.ssl.internal.ssl.SunJSSE_az.a(DashoA12275)     at … Continue reading →

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Rename log4j.properties

Posted on August 7, 2009 by nitingautam

Some time the need arises to have our log4j.properties with different name. By default, if no other configuration is given, log4j will search your classpath for a 'log4j.properties' file. Now to use your own named log4j property add the following … Continue reading →

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Log4j errors : log4j:WARN No appenders could be found for logger, log4j:WARN Please initialize the log4j system properly

Posted on July 23, 2009 by admin

This is a very common problem, it occurs when log4j.properties not found in classpath. Create a file called log4j.properties. Place it in the root folder where your java classes are found. When log4j initializes, it will look for a file … Continue reading →

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HSQLDB : java.sql.SQLException: Access is denied in statement [SELECT * FROM TBALE]

Posted on June 2, 2009 by admin

This error appears when you have not specified required privileges to user in SCRIPT file for running the statements. Use the commands as follows just after user creation grant access as DBA like below: CREATE USER SA PASSWORD "" GRANT … Continue reading →

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HSQLDB : java.sql.SQLException: User not found: SA

Posted on June 2, 2009 by nitingautam

While running HSQLDB in standalone mode you may face the error   java.sql.SQLException: User not found: SA This is because while creating the DB using script file you are not creating the user CREATE USER SA PASSWORD "" The above … Continue reading →

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org.apache.jasper.JasperException: Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV

Posted on March 24, 2009 by nitingautam

Today while running following  JSP <%@ page session="false"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %> <c:redirect url="/index.htm"/> I was hitting a error  org.apache.jasper.JasperException: Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV  I checked my classpath and found … Continue reading →

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Spring cross site scripting XSS issues solution

Posted on October 9, 2008 by nitingautam

XSS (Cross-site Scripting) is one of the most common vulnerabilities with a web-application. And, it can be exploited by hackers very easily without using any sophisticated tool. How does it work? Most web-applications have forms (text-box etc.) to receive input-data … Continue reading →

Posted in Articles, Java | 5 Comments

How To: Read web/META-INF/MANIFEST.MF in Web Application

Posted on October 1, 2008 by nitingautam

Hi All,  As you all know In web application inside web directory there is a META-INF directory. Inside which we have MANIFEST.MF that holds version information. I have to read the MANIFEST.MF from this directrory. Need the manifest info for … Continue reading →

Posted in HowTo, Java | 2 Comments

svnant: java.lang.NoClassDefFoundError: com/trilead/ssh2/InteractiveCallback

Posted on September 18, 2008 by nitingautam

Today I was integrating svn with ant using svnant plugin. I encountered the error java.lang.NoClassDefFoundError: com/trilead/ssh2/InteractiveCallback  Basically I was operating on SSH layer so it needs a additional support for connecting to the server. this is looking for trilead-ssh2-build213.zip that … Continue reading →

Posted in Java, Troubleshoot | 2 Comments