Ok, thank you for investigating further. I've been having to devote the
overwhelming majority of my time to completing a couple of day job
projects so I haven't been able to investigate this. Tomorrow I should
be available in the afternoon to look it over and try to get it fixed.
If you haven't done so already, please file an issue in Jira for this.
It would also be helpful if you could provide or describe the test case
so I can reproduce the error and verify the fix.
- James
Todd Wells wrote:
Unfortunately, this problem is getting worse, but I think I know the
fundamental problem (see below).
I went halfway down the roll-my-own route: I grabbed the XML via HTTP and
parsed it myself, then manually created a Abdera Entry in order to keep as
much of my code unchanged as possible.
Alas, there is another NullPointerException, this time when I call
abdera.newEntry()!
Caused by: java.lang.NullPointerException
at org.apache.abdera.Abdera.newEntry(Abdera.java:114)
The code at this line is very simple:
return getFactory().newEntry();
So that means getFactory() is returning null -- indicating that in the
Abdera class it is also possible to use getFactory() before factory is
initialized (exactly analogous to getParser(), where the other NPE is
thrown). At this rate I'm going to need to rip out all my Abdera-dependent
code.
Looking at the code, I¹m pretty sure I know what¹s happening ‹ the
constructor for Abdera is allowing a reference to ³this² to escape during
construction. In the constructor, Abdera calls out to newFactory(),
newParser(), etc. In those methods, it calls other methods passing ³this²
as an argument. Since the constructor hasn¹t finished executing yet, ³this²
is only a partially-constructed object at the point that these methods refer
to it, and so the integrity of that object can¹t be guaranteed. I followed
one of those code paths down the rabbit hole and discovered that the
classloader gets involved at some point, so you probably have a thread
accessing the Abdera object before it¹s fully constructed. For a more
detailed explanation, see section 3.2.1 of Brian Goetz¹s book ³Java
Concurrency in Practice², where he explicitly warns against this error.
Actually, googling I see that he had an earlier article that discusses this
same issue: http://www.ibm.com/developerworks/java/library/j-jtp0618.html
It may just be the speed of my machine or the JVM implementation (2 x 2.8
GHz quad-core Xeon running OS X) that is causing the NPE to come up in this
scenario, but the fact that ³this² is escaping during construction is a
problem that will probably cause other people grief down the road.
On 4/29/08 2:58 PM, "James M Snell" <[EMAIL PROTECTED]> wrote:
I haven't yet had the opportunity to look at this today. Hoping to be
able to look later this evening.
- James
Todd Wells wrote:
I haven't heard any more feedback on this -- since the classpaths appear
identical for practical purposes, do you think my supposition of a race
condition is a good one? Like I said previously, this is blocking my
progress, so I wouldn't mind knowing one way or the other if somebody plans
to investigate this further, so I can proceed with rolling my own if
necessary.
Thanks,
-Todd
On 4/28/08 4:21 PM, "Todd Wells" <[EMAIL PROTECTED]> wrote:
You bet. For what it's worth, I changed my maven dependency to Abdera 0.3.0
and had the same problem. I am suspecting this is a race condition of some
sort, because analyzing line 96 in AbstractClientResponse w
here the NullPointerException is thrown, it seems like it¹s probably calling
parser. getDefaultParserOptions() before parser is initialized--so it¹s
trying to call getDefaultParserOptions() on a null object. It seems as if
Abdera is using the Parser in a multi-threaded fashion since the getParser()
method is synchronized -- so I¹m suspecting a race condition between
threads somewhere where I¹m actually managing to call getDocument() before
the parser is initialized.
I wrote a little code to munge the classpaths at the command line vs. in
IDEA, and it said that IDEA has the following things in the classpath that
ant doesn't:
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/cha
rsets.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/cla
sses.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/dt.
jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/jce
.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/jco
nsole.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/jss
e.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/laf
.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/ui.
jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/deploy.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/dt.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/apple_
provider.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/dnsns.
jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/locale
data.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/sunjce
_provider.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/sunpkc
s11.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/javaws.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/jce.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/plugin.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/sa-jdi.jar
Since the command-line is using the same VM (the one built in to OS X), I¹ll
assume those VM jars are actually there implicitly. There weren¹t any cases
where there were mis-matched versions of jars. The only jar that the
command line class path included that isn¹t included in IDEA is the jar that
contains the code which is being developed in IDEA which is the code that
calls into Abdera (hence IDEA doesn¹t need a jar of it, it has the classes
directly).
Below are the "raw" class paths -- they are big, my apologies in advance.
Classpath from the command line (ant):
/Users/todd.wells/.m2/repository/org/apache/maven/maven-artifact/2.0.2/maven
-artifact-2.0.2.jar:/Users/todd.wells/.m2/repository/org/springframework/spr
ing-beans/2.0.6/spring-beans-2.0.6.jar:/Users/todd.wells/.m2/repository/aopa
lliance/aopalliance/1.0/aopalliance-1.0.jar:/Users/todd.wells/.m2/repository
/org/apache/abdera/abdera-i18n/0.4.0-incubating/abdera-i18n-0.4.0-incubating
.jar:/Users/todd.wells/.m2/repository/org/apache/maven/maven-error-diagnosti
cs/2.0.2/maven-error-diagnostics-2.0.2.jar:/Users/todd.wells/.m2/repository/
commons-httpclient/commons-httpclient/3.1-rc1/commons-httpclient-3.1-rc1.jar
:/Users/todd.wells/.m2/repository/javax/servlet/servlet-api/2.4/servlet-api-
2.4.jar:/Users/todd.wells/.m2/repository/commons-logging/commons-logging/1.0
.4/commons-logging-1.0.4.jar:/Users/todd.wells/.m2/repository/stax/stax-api/
1.0.1/stax-api-1.0.1.jar:/Users/todd.wells/.m2/repository/log4j/log4j/1.2.13
/log4j-1.2.13.jar:/Users/todd.wells/.m2/repository/org/apache/abdera/abdera-
server/0.4.0-incubating/abdera-server-0.4.0-incubating.jar:/Users/todd.wells
/.m2/repository/com/theplatform/test/modules/wordgenerator/pl-test-wordgener
ator/1.0.0/pl-test-wordgenerator-1.0.0.jar:/Users/todd.wells/.m2/repository/
jaxen/jaxen/1.1.1/jaxen-1.1.1.jar:/Users/todd.wells/.m2/repository/org/apach
e/geronimo/specs/geronimo-stax-api_1.0_spec/1.0.1/geronimo-stax-api_1.0_spec
-1.0.1.jar:/Users/todd.wells/.m2/repository/org/springframework/spring-web/2
.0.6/spring-web-2.0.6.jar:/Users/todd.wells/.m2/repository/org/apache/maven/
maven-artifact-ant/2.0.4/maven-artifact-ant-2.0.4.jar:/Users/todd.wells/.m2/
repository/com/theplatform/modules/pl-galaxy/1.1.0-SNAPSHOT/pl-galaxy-1.1.0-
SNAPSHOT.jar:/Users/todd.wells/.m2/repository/xml-apis/xml-apis/1.3.03/xml-a
pis-1.3.03.jar:/Users/todd.wells/.m2/repository/commons-codec/commons-codec/
1.3/commons-codec-1.3.jar:/Users/todd.wells/.m2/repository/org/codehaus/plex
us/plexus-container-default/1.0-alpha-9/plexus-container-default-1.0-alpha-9
.jar:/Users/todd.wells/.m2/repository/org/apache/maven/wagon/wagon-provider-
api/1.0-alpha-6/wagon-provider-api-1.0-alpha-6.jar:/Users/todd.wells/.m2/rep
ository/classworlds/classworlds/1.1-alpha-2/classworlds-1.1-alpha-2.jar:/Use
rs/todd.wells/.m2/repository/org/apache/ws/commons/axiom/axiom-impl/1.2.5/ax
iom-impl-1.2.5.jar:/Users/todd.wells/.m2/repository/org/springframework/spri
ng-core/2.0.6/spring-core-2.0.6.jar:/Users/todd.wells/.m2/repository/javax/m
ail/mail/1.4/mail-1.4.jar:/Users/todd.wells/.m2/repository/org/apache/abdera
/abdera-parser/0.4.0-incubating/abdera-parser-0.4.0-incubating.jar:/Users/to
dd.wells/.m2/repository/org/apache/maven/maven-artifact-manager/2.0.2/maven-
artifact-manager-2.0.2.jar:/Users/todd.wells/.m2/repository/org/apache/maven
/maven-project/2.0.2/maven-project-2.0.2.jar:/Users/todd.wells/.m2/repositor
y/org/apache/maven/maven-settings/2.0.2/maven-settings-2.0.2.jar:/Users/todd
.wells/.m2/repository/groovy/groovy-all/1.5.5/groovy-all-1.5.5.jar:/Users/to
dd.wells/.m2/repository/org/apache/maven/maven-model/2.0.2/maven-model-2.0.2
.jar:/Users/todd.wells/.m2/repository/org/apache/geronimo/specs/geronimo-act
ivation_1.0.2_spec/1.1/geronimo-activation_1.0.2_spec-1.1.jar:/Users/todd.we
lls/.m2/repository/org/codehaus/woodstox/wstx-asl/3.2.1/wstx-asl-3.2.1.jar:/
Users/todd.wells/.m2/repository/ant/ant/1.7/ant-1.7.jar:/Users/todd.wells/.m
2/repository/org/springframework/spring-context/2.0.6/spring-context-2.0.6.j
ar:/Users/todd.wells/.m2/repository/org/apache/maven/maven-repository-metada
ta/2.0.2/maven-repository-metadata-2.0.2.jar:/Users/todd.wells/.m2/repositor
y/xalan/xalan/2.6.0/xalan-2.6.0.jar:/Users/todd.wells/.m2/repository/com/ibm
/icu/icu4j/2.6.1/icu4j-2.6.1.jar:/Users/todd.wells/.m2/repository/jdom/jdom/
1.0/jdom-1.0.jar:/Users/todd.wells/.m2/repository/org/apache/abdera/abdera-s
pring/0.4.0-incubating/abdera-spring-0.4.0-incubating.jar:/Users/todd.wells/
.m2/repository/junit/junit/4.0/junit-4.0.jar:/Users/todd.wells/.m2/repositor
y/org/apache/maven/maven-profile/2.0.2/maven-profile-2.0.2.jar:/Users/todd.w
ells/.m2/repository/com/theplatform/test/modules/datehelper/pl-test-datehelp
er/1.0-SNAPSHOT/pl-test-datehelper-1.0-SNAPSHOT.jar:/Users/todd.wells/.m2/re
pository/javax/activation/activation/1.1/activation-1.1.jar:/Users/todd.well
s/.m2/repository/org/apache/ws/commons/axiom/axiom-api/1.2.5/axiom-api-1.2.5
.jar:/Users/todd.wells/.m2/repository/org/apache/maven/wagon/wagon-file/1.0-
alpha-7/wagon-file-1.0-alpha-7.jar:/Users/todd.wells/.m2/repository/org/code
haus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar:/Users/todd.wells/.m2/repo
sitory/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar:/Users/todd.wells/.m2/repository/an
t/ant-launcher/1.7/ant-launcher-1.7.jar:/Users/todd.wells/.m2/repository/xer
ces/xmlParserAPIs/2.6.2/xmlParserAPIs-2.6.2.jar:/Users/todd.wells/.m2/reposi
tory/xom/xom/1.0/xom-1.0.jar:/Users/todd.wells/.m2/repository/org/apache/abd
era/abdera-client/0.4.0-incubating/abdera-client-0.4.0-incubating.jar:/Users
/todd.wells/.m2/repository/org/apache/abdera/abdera-core/0.4.0-incubating/ab
dera-core-0.4.0-incubating.jar:/Users/todd.wells/.m2/repository/xerces/xerce
sImpl/2.8.0/xercesImpl-2.8.0.jar:/Users/todd.wells/.m2/repository/org/apache
/maven/wagon/wagon-http-lightweight/1.0-alpha-6/wagon-http-lightweight-1.0-a
lpha-6.jar
Classpath in IDEA:
/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/deploy.jar
:/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/dt.jar:/S
ystem/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/javaws.jar:/
System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/jce.jar:/Sy
stem/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/plugin.jar:/S
ystem/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/sa-jdi.jar:/
System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Classes/char
sets.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/../Cl
asses/classes.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5/H
ome/../Classes/dt.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1
.5/Home/../Classes/jce.jar:/System/Library/Frameworks/JavaVM.framework/Versi
ons/1.5/Home/../Classes/jconsole.jar:/System/Library/Frameworks/JavaVM.frame
work/Versions/1.5/Home/../Classes/jsse.jar:/System/Library/Frameworks/JavaVM
.framework/Versions/1.5/Home/../Classes/laf.jar:/System/Library/Frameworks/J
avaVM.framework/Versions/1.5/Home/../Classes/ui.jar:/System/Library/Framewor
ks/JavaVM.framework/Versions/1.5/Home/lib/ext/apple_provider.jar:/System/Lib
rary/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/dnsns.jar:/System
/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/localedata.ja
r:/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home/lib/ext/sunj
ce_provider.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Hom
e/lib/ext/sunpkcs11.jar:/depot/Tools/deploy/galaxy/main/target/classes:/User
s/todd.wells/.m2/repository/junit/junit/4.0/junit-4.0.jar:/Users/todd.wells/
.m2/repository/log4j/log4j/1.2.13/log4j-1.2.13.jar:/Users/todd.wells/.m2/rep
ository/com/theplatform/test/modules/wordgenerator/pl-test-wordgenerator/1.0
.0/pl-test-wordgenerator-1.0.0.jar:/Users/todd.wells/.m2/repository/com/thep
latform/test/modules/datehelper/pl-test-datehelper/1.0-SNAPSHOT/pl-test-date
helper-1.0-SNAPSHOT.jar:/Users/todd.wells/.m2/repository/org/apache/abdera/a
bdera-client/0.4.0-incubating/abdera-client-0.4.0-incubating.jar:/Users/todd
.wells/.m2/repository/org/apache/abdera/abdera-core/0.4.0-incubating/abdera-
core-0.4.0-incubating.jar:/Users/todd.wells/.m2/repository/org/apache/abdera
/abdera-i18n/0.4.0-incubating/abdera-i18n-0.4.0-incubating.jar:/Users/todd.w
ells/.m2/repository/org/apache/geronimo/specs/geronimo-activation_1.0.2_spec
/1.1/geronimo-activation_1.0.2_spec-1.1.jar:/Users/todd.wells/.m2/repository
/commons-codec/commons-codec/1.3/commons-codec-1.3.jar:/Users/todd.wells/.m2
/repository/org/apache/abdera/abdera-parser/0.4.0-incubating/abdera-parser-0
.4.0-incubating.jar:/Users/todd.wells/.m2/repository/org/apache/ws/commons/a
xiom/axiom-impl/1.2.5/axiom-impl-1.2.5.jar:/Users/todd.wells/.m2/repository/
org/apache/ws/commons/axiom/axiom-api/1.2.5/axiom-api-1.2.5.jar:/Users/todd.
wells/.m2/repository/commons-logging/commons-logging/1.0.4/commons-logging-1
.0.4.jar:/Users/todd.wells/.m2/repository/jaxen/jaxen/1.1.1/jaxen-1.1.1.jar:
/Users/todd.wells/.m2/repository/xerces/xercesImpl/2.8.0/xercesImpl-2.8.0.ja
r:/Users/todd.wells/.m2/repository/xml-apis/xml-apis/1.3.03/xml-apis-1.3.03.
jar:/Users/todd.wells/.m2/repository/org/apache/geronimo/specs/geronimo-stax
-api_1.0_spec/1.0.1/geronimo-stax-api_1.0_spec-1.0.1.jar:/Users/todd.wells/.
m2/repository/org/codehaus/woodstox/wstx-asl/3.2.1/wstx-asl-3.2.1.jar:/Users
/todd.wells/.m2/repository/commons-httpclient/commons-httpclient/3.1-rc1/com
mons-httpclient-3.1-rc1.jar:/Users/todd.wells/.m2/repository/org/apache/abde
ra/abdera-server/0.4.0-incubating/abdera-server-0.4.0-incubating.jar:/Users/
todd.wells/.m2/repository/javax/servlet/servlet-api/2.4/servlet-api-2.4.jar:
/Users/todd.wells/.m2/repository/org/apache/abdera/abdera-spring/0.4.0-incub
ating/abdera-spring-0.4.0-incubating.jar:/Users/todd.wells/.m2/repository/or
g/springframework/spring-web/2.0.6/spring-web-2.0.6.jar:/Users/todd.wells/.m
2/repository/org/springframework/spring-beans/2.0.6/spring-beans-2.0.6.jar:/
Users/todd.wells/.m2/repository/org/springframework/spring-core/2.0.6/spring
-core-2.0.6.jar:/Users/todd.wells/.m2/repository/org/springframework/spring-
context/2.0.6/spring-context-2.0.6.jar:/Users/todd.wells/.m2/repository/aopa
lliance/aopalliance/1.0/aopalliance-1.0.jar:/Users/todd.wells/.m2/repository
/org/apache/maven/maven-artifact-ant/2.0.4/maven-artifact-ant-2.0.4.jar:/Use
rs/todd.wells/.m2/repository/org/apache/maven/maven-project/2.0.2/maven-proj
ect-2.0.2.jar:/Users/todd.wells/.m2/repository/org/apache/maven/maven-profil
e/2.0.2/maven-profile-2.0.2.jar:/Users/todd.wells/.m2/repository/org/apache/
maven/maven-model/2.0.2/maven-model-2.0.2.jar:/Users/todd.wells/.m2/reposito
ry/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar:/Users/todd.wel
ls/.m2/repository/org/codehaus/plexus/plexus-container-default/1.0-alpha-9/p
lexus-container-default-1.0-alpha-9.jar:/Users/todd.wells/.m2/repository/cla
ssworlds/classworlds/1.1-alpha-2/classworlds-1.1-alpha-2.jar:/Users/todd.wel
ls/.m2/repository/org/apache/maven/maven-artifact-manager/2.0.2/maven-artifa
ct-manager-2.0.2.jar:/Users/todd.wells/.m2/repository/org/apache/maven/maven
-repository-metadata/2.0.2/maven-repository-metadata-2.0.2.jar:/Users/todd.w
ells/.m2/repository/org/apache/maven/maven-artifact/2.0.2/maven-artifact-2.0
.2.jar:/Users/todd.wells/.m2/repository/org/apache/maven/wagon/wagon-provide
r-api/1.0-alpha-6/wagon-provider-api-1.0-alpha-6.jar:/Users/todd.wells/.m2/r
epository/org/apache/maven/maven-error-diagnostics/2.0.2/maven-error-diagnos
tics-2.0.2.jar:/Users/todd.wells/.m2/repository/org/apache/maven/maven-setti
ngs/2.0.2/maven-settings-2.0.2.jar:/Users/todd.wells/.m2/repository/org/apac
he/maven/wagon/wagon-file/1.0-alpha-7/wagon-file-1.0-alpha-7.jar:/Users/todd
.wells/.m2/repository/org/apache/maven/wagon/wagon-http-lightweight/1.0-alph
a-6/wagon-http-lightweight-1.0-alpha-6.jar:/Users/todd.wells/.m2/repository/
ant/ant/1.7/ant-1.7.jar:/Users/todd.wells/.m2/repository/groovy/groovy-all/1
.5.5/groovy-all-1.5.5.jar:/Users/todd.wells/.m2/repository/javax/mail/mail/1
.4/mail-1.4.jar:/Users/todd.wells/.m2/repository/javax/activation/activation
/1.1/activation-1.1.jar:/Users/todd.wells/.m2/repository/stax/stax-api/1.0.1
/stax-api-1.0.1.jar:/Users/todd.wells/.m2/repository/dom4j/dom4j/1.6.1/dom4j
-1.6.1.jar:/Users/todd.wells/.m2/repository/jdom/jdom/1.0/jdom-1.0.jar:/User
s/todd.wells/.m2/repository/xom/xom/1.0/xom-1.0.jar:/Users/todd.wells/.m2/re
pository/xerces/xmlParserAPIs/2.6.2/xmlParserAPIs-2.6.2.jar:/Users/todd.well
s/.m2/repository/xalan/xalan/2.6.0/xalan-2.6.0.jar:/Users/todd.wells/.m2/rep
ository/com/ibm/icu/icu4j/2.6.1/icu4j-2.6.1.jar:/Users/todd.wells/.m2/reposi
tory/ant/ant-launcher/1.7/ant-launcher-1.7.jar
On 4/28/08 2:56 PM, "Dan Diephouse" <[EMAIL PROTECTED]> wrote:
Well I'll be honest, I'm stumped too. This is with 0.4.0 right? Any
chance you can print out the classpath?
Dan
Todd Wells wrote:
I1m stumped. I have this repeatable case where
ClientResponse.getDocument()
results in a NullPointerException, even though a fully-formed atom
document
was successfully retrieved.
Here1s the weird part Ð and sorry there are so many caveats here Ð this is
running from inside an ant task that I1ve written. When I run it inside
of
the debugger or IDE (while not debugging) it works just fine. When I run
it
via the command line I get the NPE every time. I1m routing both attempts
through an HTTP proxy (fiddler) and I can see that the HTTP request and
response are the same in both cases , but in the one case Abdera throws
the
NPE. I1ve been poking at this for several hours now and I1m at my wit1s
end. Here1s the stack trace I1m getting. Any idea how I could further
nail
this down?
Caused by: java.lang.NullPointerException
at
org.apache.abdera.protocol.client.AbstractClientResponse.getDocument(Abstr
ac
tClientResponse.java:96)
at
org.apache.abdera.protocol.client.AbstractClientResponse.getDocument(Abstr
ac
tClientResponse.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm
pl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:226)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:910)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:754)
at
org.codehaus.groovy.runtime.InvokerHelper.invokePojoMethod(InvokerHelper.j
av
a:765)
at
org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:
75
3)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptByte
co
deAdapter.java:167)
My best (and somewhat feeble) guess is that there1s something different in
the class paths that is causing the difference in behavior. What that
might
be, I have no idea.
