Venkat Ranganathan created FALCON-2050:
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Summary: Configure jetty parent classloader to be prioritized over
webapp classloader
Key: FALCON-2050
URL: https://issues.apache.org/jira/browse/FALCON-2050
Project: Falcon
Issue Type: Bug
Components: common
Affects Versions: 0.10
Reporter: Venkat Ranganathan
Assignee: Venkat Ranganathan
FALCON-1942 allowed external libraries to be configured so that libraries like
Atlas hook can be configured (which the Atlas code itself was part of the Atlas
client installation). Unfortunately, the FACLON_EXTRA_CLASSPATH only is
available in the parent classloader and not via the webapp classloader causing
stack trace like below to be thrown
To fix this, we need to enable the parent classloader to have priority over the
webapp classloader. When a class or resource is resolved, the parent
classloader will be used and then the child classloader.
Since all falcon jars are also in the parent path this should fix the issue
with Atlas hook and similar scnearios.
{quote}
2016-06-24 14:50:47,022 ERROR - [main:] ~ Failed startup of context
org.mortbay.jetty.webapp.WebAppContext@46e481d6{/,/usr/hdp/current/falcon-server/server/webapp/falcon}
(log:87)
java.lang.ClassCastException: org.apache.falcon.atlas.service.AtlasService
cannot be cast to org.apache.falcon.service.FalconService
at
org.apache.falcon.service.ServiceInitializer.initialize(ServiceInitializer.java:43)
at
org.apache.falcon.listener.ContextStartupListener.contextInitialized(ContextStartupListener.java:56)
at
org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:550)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:519)
at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.apache.falcon.util.EmbeddedServer.start(EmbeddedServer.java:57)
at org.apache.falcon.FalconServer.main(FalconServer.java:118)
{quote}
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