https://bz.apache.org/bugzilla/show_bug.cgi?id=58629
Bug ID: 58629
Summary: Container is not initialized while starting tomcat in
embedded mode.
Product: Tomcat 9
Version: 9.0.0.M1
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Created attachment 33284
--> https://bz.apache.org/bugzilla/attachment.cgi?id=33284&action=edit
Patch for the solution.
For earliar versions, following code works. But for tomcat 9 , It is giving
null pointer exception while starting the server.
Tomcat tomcat = new Tomcat();
tomcat.setHostname("localhost");
tomcat.setPort(8080);
tomcat.setBaseDir("D:/softwares/servers/STUDY_TOMCAT");
tomcat.start();
Exception in thread "main" org.apache.catalina.LifecycleException: Failed to
start component [StandardServer[-1]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:159)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:345)
at com.gandhisagar.test.TomcatStart.main(TomcatStart.java:13)
Caused by: org.apache.catalina.LifecycleException: Failed to start component
[StandardService[Tomcat]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:159)
at
org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:769)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:155)
... 2 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component
[org.apache.catalina.mapper.MapperListener@685f4c2e]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:159)
at
org.apache.catalina.core.StandardService.startInternal(StandardService.java:451)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:155)
... 4 more
Caused by: java.lang.NullPointerException
at
org.apache.catalina.mapper.MapperListener.findDefaultHost(MapperListener.java:261)
at
org.apache.catalina.mapper.MapperListener.startInternal(MapperListener.java:102)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:155)
... 6 more
Solution:
While debugging the issue we found that , Container is not getting initialized
properly. So we need to call corg.apache.catalina.startup.Tomcat.getEngine()
while starting the server in embedded mode. So that same code will work with
Tomcat 9.0
(Attaching the patch with the bug)
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