Errors

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Thu 2 Apr 2009

java.net.ProtocolException: Server redirected too many times

Posted by Pandian R under Errors, java
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This is another nasty exception I came across today. I was developing a core java application that connects to internet via proxy. It was working fine with hardcoded values for username (domain\\myname as username and secret as password). When I accepted the same strings as command line arguments, the process did quit with this.

java.net.ProtocolException: Server redirected too many times (20)

Finally I came to know that I made a mistake with the username. Double slash is wrong when we give the string as command line argument. So, the server is keep on asking the username and password, which broke the process once the threshold 20 exceeded.

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Sun 23 Nov 2008

Way to Struts 1.2 DataSource

Posted by Pandian R under Errors, datasource, jdbc, struts, tomcat
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hurray

Today I had downloaded struts 1.2.7 and tried to write an application. (I know I am selecting a bit old.) I configured the datasource in struts. Alas. When I tried to start my server, tomcat 6.0, I got the error saying "java.lang.ClassNotFoundException: org.apache.commons.dbcp.BasicDataSource". With Googling I found struts-legacy.jar need to downloaded and copied to lib folder of Tomcat. (I couldnt get the recent version of struts-legacy. I found something in archive). Happily restarted the server. I saw java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool.. oof.. again I need to download commons-dbcp-1.2.2.jar and commons-pool.jar.

My search come to an end :) It is working fine now.

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Sun 20 Apr 2008

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

Posted by Pandian R under Errors, Mandriva, jdbc, linux, mysql
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kuttikaranam

Today I had a new install of Mandriva 2008 linux. I wrote a java code to test the mysql connectivity. It ended with the following exception.

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Last packet sent to the server was 0 ms ago.

Alas, deeper google search gives me a solution that told about the mysql connectivity parameter in /etc/my.cnf

skip-networking

This parameter has been added for some security related reasons. Really I dont know what it is. I just removed that line, which solved this issue.

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