I'm having some very odd problems with Tapestry 5.4.3. Most of my stuff
is on 5.3, so I haven't been able to dig very deep on this, and I'm not
quite sure what I'm missing. I'm running Tomcat 8.5.x. Now, it appears
that might be from
classpath:org/apache/tapestry5/corelib/pages/ExceptionReport.tml. But
something else must be generating the error. I've been able to make it
go away with a restart of Tomcat, but not of just the app itself. I'm
fairly confused. I think that the exception being reported isn't the
actual root cause, but rather the exception that is reported due to an
error with reporting the actual exception.
2018-05-23 17:57:10,697 [ERROR] ioc.Registry java.lang.NullPointerException
2018-05-23 17:57:10,698 [ERROR] ioc.Registry Operations trace:
2018-05-23 17:57:10,698 [ERROR] ioc.Registry [ 1] Handling page render
request for page Index
2018-05-23 17:57:10,698 [ERROR] ioc.Registry [ 2] Constructing instance
of page class edu.ndsu.eci.international_capstone_exchange.pages.Index
2018-05-23 17:57:10,698 [ERROR] ioc.Registry [ 3] Creating
ComponentAssembler for
edu.ndsu.eci.international_capstone_exchange.pages.Index
2018-05-23 17:57:10,698 [ERROR] ioc.Registry [ 4] Parsing component
template
classpath:edu/ndsu/eci/international_capstone_exchange/pages/Index.tml
2018-05-23 17:57:10,712 [ERROR] TapestryModule.RequestExceptionHandler
Processing of request failed with uncaught exception:
org.apache.tapestry5.ioc.internal.OperationException
org.apache.tapestry5.ioc.internal.OperationException
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.logAndRethrow(OperationTrackerImpl.java:186)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:90)
at
org.apache.tapestry5.ioc.internal.PerThreadOperationTracker.invoke(PerThreadOperationTracker.java:72)
at
org.apache.tapestry5.ioc.internal.RegistryImpl.invoke(RegistryImpl.java:1260)
at
org.apache.tapestry5.internal.services.TemplateParserImpl.parseTemplate(TemplateParserImpl.java:57)
at $TemplateParser_95423bef7.parseTemplate(Unknown Source)
at
org.apache.tapestry5.internal.services.ComponentTemplateSourceImpl.parseTemplate(ComponentTemplateSourceImpl.java:190)
at
org.apache.tapestry5.internal.services.ComponentTemplateSourceImpl.getTemplate(ComponentTemplateSourceImpl.java:162)
at $ComponentTemplateSource_95423bef6.getTemplate(Unknown Source)
at
org.apache.tapestry5.internal.pageload.PageLoaderImpl$4.invoke(PageLoaderImpl.java:258)
at
org.apache.tapestry5.internal.pageload.PageLoaderImpl$4.invoke(PageLoaderImpl.java:251)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:82)
at
org.apache.tapestry5.ioc.internal.PerThreadOperationTracker.invoke(PerThreadOperationTracker.java:72)
at
org.apache.tapestry5.ioc.internal.RegistryImpl.invoke(RegistryImpl.java:1260)
snip
Caused by: java.lang.NullPointerException
at
org.apache.tapestry5.internal.services.XMLTokenStream.getLocation(XMLTokenStream.java:487)
at
org.apache.tapestry5.internal.services.SaxTemplateParser.parse(SaxTemplateParser.java:181)
at
org.apache.tapestry5.internal.services.TemplateParserImpl$1.invoke(TemplateParserImpl.java:61)
at
org.apache.tapestry5.internal.services.TemplateParserImpl$1.invoke(TemplateParserImpl.java:58)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:82)
... 102 more
2018-05-23 17:57:10,804 [ERROR] ioc.Registry java.lang.NullPointerException
2018-05-23 17:57:10,804 [ERROR] ioc.Registry Operations trace:
2018-05-23 17:57:10,804 [ERROR] ioc.Registry [ 1] Constructing instance
of page class org.apache.tapestry5.corelib.pages.ExceptionReport
2018-05-23 17:57:10,804 [ERROR] ioc.Registry [ 2] Creating
ComponentAssembler for org.apache.tapestry5.corelib.pages.ExceptionReport
2018-05-23 17:57:10,804 [ERROR] ioc.Registry [ 3] Parsing component
template classpath:org/apache/tapestry5/corelib/pages/ExceptionReport.tml
To add to the confusion, I've never had the error trigger when running
on my workstation using Tomcat, just as installed on our server. Almost
makes me think that it is trying to write somewhere that is causing
problems. I just restarted Tomcat, and it now loads. How do I find root
cause? I've turned logging all the way up, and then there is too much
noise. Since I can't get it to trigger on my workstation, I can't get a
debugger connected to figure it out from there.
Thanks,
Richard
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