Glassfish 4 deployment error

java eclipse jakarta-ee glassfish glassfish-4
galovics picture galovics · Oct 30, 2013 · Viewed 14.2k times · Source

I added some libraries to my JavaEE project and then deploy the application works. I modified something and I got this error message in Eclipse:

Cannot Deploy ProjectName
deploy is failing=Error occurred during deployment: Keys cannot be duplicate. 
Old value of                 this key property, nullwill be retained. 
Please see server.log for more details.
java.lang.LinkageError: loader (instance of  
org/glassfish/web/loader/WebappClassLoader):
attempted  duplicate class definition for name: 
"org/glassfish/web/loader/JdbcLeakPrevention"
loader (instance of  org/glassfish/web/loader/WebappClassLoader): attempted  duplicate 
class definition for name: "org/glassfish/web/loader/JdbcLeakPrevention"

I made some research and I found out that it is not an Eclipse bug. I'm working with Kepler but I tested with Juno too. Got the same error message. I downloaded Glassfish 3.1.2.2 and the message gone.

Why am I getting this message?

Answer

Catalin Ciolocoiu picture Catalin Ciolocoiu · Apr 7, 2015

I Had the same error. I stopped the GLassfish server and then I cleaned the project (Project -> Clean... ). Started the server and worked

Related questions

Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved

org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-resources-plugin:jar:2.5 at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(…

Read More
UnsupportedClassVersionError: JVMCFRE003 bad major version in WebSphere AS 7

I am getting this error java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=map/CareMonths, offset=6 My Eclipse's Java compiler is set to 1.6 and my installed Java SDK in C:\Program Files is 1.6.0, but still I get this error when …

Read More
What is the difference between Eclipse for Java (EE) Developers and Eclipse Classic?

What is the difference between Eclipse for Java (EE) Developers and Eclipse Classic? Both are marked as version 3.6. Which one should I use?

Read More