https://bz.apache.org/bugzilla/show_bug.cgi?id=64947
Bug ID: 64947
Summary: NPE in UpgradeProcessorExternal constructor
Product: Tomcat 9
Version: 9.0.40
Hardware: PC
OS: Mac OS X 10.4
Status: NEW
Severity: normal
Priority: P2
Component: Connectors
Assignee: dev@tomcat.apache.org
Reporter: majorpe...@gmail.com
Target Milestone: -----
When implementing a custom HttpUpgradeHandler implementation, the connection
upgrade can fail with an NPE and the following stacktrace:
java.lang.NullPointerException
at
org.apache.coyote.http11.upgrade.UpgradeProcessorExternal.<init>(UpgradeProcessorExternal.java:46)
at
org.apache.coyote.http11.AbstractHttp11Protocol.createUpgradeProcessor(AbstractHttp11Protocol.java:1102)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:912)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1601)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)
The custom http upgrade handler attempts to customize websocket connection
upgrade, but this upgrade processing is terminated by the NPE caused by the
null upgradeGroupInfo object in UpgradeProcessorExternal constructor.
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