Currently I get the following output from code run
Caused by: java.lang.NullPointerException
at com.gargoylesoftware.htmlunit.html.HtmlScript$2.execute(HtmlScript.java:227)
at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:256)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.endElement(HtmlUnitNekoDOMBuilder.java:560)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.endElement(HtmlUnitNekoDOMBuilder.java:514)
at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1192)
at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1132)
at net.sourceforge.htmlunit.cyberneko.filters.DefaultFilter.endElement(DefaultFilter.java:219)
at net.sourceforge.htmlunit.cyberneko.filters.NamespaceBinder.endElement(NamespaceBinder.java:312)
at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3189)
at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2114)
at net.sourceforge.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:937)
at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:443)
at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:394)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.parse(HtmlUnitNekoDOMBuilder.java:760)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoHtmlParser.parseFragment(HtmlUnitNekoHtmlParser.java:158)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoHtmlParser.parseFragment(HtmlUnitNekoHtmlParser.java:112)
at com.gargoylesoftware.htmlunit.javascript.host.Element.parseHtmlSnippet(Element.java:868)
at com.gargoylesoftware.htmlunit.javascript.host.Element.setInnerHTML(Element.java:920)
at com.gargoylesoftware.htmlunit.javascript.host.html.HTMLElement.setInnerHTML(HTMLElement.java:676)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.sourceforge.htmlunit.corejs.javascript.MemberBox.invoke(MemberBox.java:188)
... 30 more
The above ... 30 more means that I do not know the line of my code that causes the problem. How can I get the full stack trace.
Also, if it does not seem to be running any of my catch statements with printStackTrace, but if I turn off logging with the below command
java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(java.util.logging.Level.OFF);
java.util.logging.Logger.getLogger("org.apache.http").setLevel(java.util.logging.Level.OFF);
**Have put in my full code below as suggested by the comments below . Did not put in the actual URL though**
import com.gargoylesoftware.htmlunit.html.*;
import java.io.File;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
public class download_to_send_to_stackoverflow
{
public static void main(String args[])
{
String url = "did not want to include the actual web site ";
HtmlPage page = null;
WebClient webClient = new WebClient();
webClient.getOptions().setRedirectEnabled(true);
webClient.getOptions().setJavaScriptEnabled(true); // tried making false - but didnt work
webClient.getOptions().setCssEnabled(false);
webClient.getOptions().setUseInsecureSSL(true);
webClient.getOptions().setTimeout(30000);
webClient.setJavaScriptTimeout(30000); //e.g. 50s
webClient.waitForBackgroundJavaScript(15000) ; // added 2017/1/24
webClient.waitForBackgroundJavaScriptStartingBefore(30000) ; // added 2017/1/24
try
{
page = webClient.getPage( url );
savePage_just_html(page );
}
catch( Exception e )
{
System.out.println( "Exception thrown:----------------------------------------" + e.getMessage() );
e.printStackTrace();
}
}
protected static String savePage_just_html(HtmlPage page)
{
try
{
File saveFolder = new File("spool/_");
page.save(saveFolder); // this is the line causing the error with limit stack trace
}
catch ( Exception e )
{
System.out.println( "IOException was thrown: ---------------------------------- " + e.getMessage() );
e.printStackTrace();
}
return "file.html";
}
}
------------------------------------------------------
page.save(saveFolder); above is the problem line. if I take it out I dont get the limited statcktrace errors but I also dont save the html page - which I want to do
- The question is - why does this line only print a limited stacktrace
The "Caused by" means that this is a nested exception.
The "... 30 more" in a nested exception stacktrace means that those 30 lines are the same as in the primary exception.
So just look at the primary stacktrace to see those stack frames.
Apparently your exception stacktraces are being generated in a way that is suppressing (or removing) the primary exception stacktrace. This is puzzling, but it is probably being done by one of the unit testing libraries that you are using.
Getting to the bottom of this will probably involve you either debugging whatever it is that is generating the stacktrace, or writing a minimal reproducible example so that someone else can debug it.
Related
um trying to instrument a method to do the following task.
Task - Create a Map and insert values to the map
Adding System.out.println lines wouldn't cause any exception. But when i add the line to create the Map, it throws a cannotCompileException due to a missing ;. When i print the final string it doesn't seem to miss any. What am i doing wrong here.
public void createInsertAt(CtMethod method, int lineNo, Map<String,String> parameterMap)
throws CannotCompileException {
StringBuilder atBuilder = new StringBuilder();
atBuilder.append("System.out.println(\"" + method.getName() + " is running\");");
atBuilder.append("java.util.Map<String,String> arbitraryMap = new java.util.HashMap<String,String>();");
for (Map.Entry<String,String> entry : parameterMap.entrySet()) {
}
System.out.println(atBuilder.toString());
method.insertAt(1, atBuilder.toString());
}
String obtained by printing the output of string builder is,
System.out.println("prepareStatement is
running");java.util.Map arbitraryMap = new
java.util.HashMap();
Exception received is,
javassist.CannotCompileException: [source error] ; is missing
at javassist.CtBehavior.insertAt(CtBehavior.java:1207)
at javassist.CtBehavior.insertAt(CtBehavior.java:1134)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.createInsertAt(InstrumentationClassTransformer.java:126)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.instrumentMethod(InstrumentationClassTransformer.java:100)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.transform(InstrumentationClassTransformer.java:37)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424)
at sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
at sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:144)
at org.wso2.das.javaagent.instrumentation.Agent.premain(Agent.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:382)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:397)
Caused by: compile error: ; is missing
at javassist.compiler.Parser.parseDeclarationOrExpression(Parser.java:594)
at javassist.compiler.Parser.parseStatement(Parser.java:277)
at javassist.compiler.Javac.compileStmnt(Javac.java:567)
at javassist.CtBehavior.insertAt(CtBehavior.java:1186)
... 15 more
(Is there any way to debug these kind of issues.) Some help please.....
Javassist's compiler doesn't support generics. Either remove or comment them out:
.append("java.util.Map arbitraryMap = new java.util.HashMap();")
or
.append("java.util.Map/*<String,String>*/ arbitraryMap = new java.util.HashMap/*<String,String>*/();")
The latter is useful as comment for yourself only, of course, it has no special meaning for Javassist.
The error I am getting is as follows:
" Aug 25, 2015 1:47:41 PM com.orientechnologies.common.log.OLogManager log
INFO: OrientDB auto-config DISKCACHE=4,161MB (heap=1,776MB os=7,985MB disk=416,444MB)
Aug 25, 2015 1:47:41 PM com.orientechnologies.common.log.OLogManager log
WARNING: segment file 'database.ocf' was not closed correctly last time
Exception in thread "main" com.orientechnologies.common.exception.OException: Error on creation
of shared resource
at com.orientechnologies.common.concur.resource.OSharedContainerImpl.getResource(OSharedContainerImpl.java:55)
at com.orientechnologies.orient.core.metadata.OMetadataDefault.init(OMetadataDefault.java:175)
at com.orientechnologies.orient.core.metadata.OMetadataDefault.load(OMetadataDefault.java:77)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.initAtFirstOpen(ODatabaseDocumentTx.java:2633)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.open(ODatabaseDocumentTx.java:254)
at arss.db.main(db.java:17)
Caused by: com.orientechnologies.orient.core.exception.ORecordNotFoundException:
The record with id '#0:1' not found
at com.orientechnologies.orient.core.record.ORecordAbstract.reload(ORecordAbstract.java:266)
at com.orientechnologies.orient.core.record.impl.ODocument.reload(ODocument.java:665)
at com.orientechnologies.orient.core.type.ODocumentWrapper.reload(ODocumentWrapper.java:91)
at com.orientechnologies.orient.core.type.ODocumentWrapperNoClass.reload(ODocumentWrapperNoClass.java:73)
at com.orientechnologies.orient.core.metadata.schema.OSchemaShared.load(OSchemaShared.java:786)
at com.orientechnologies.orient.core.metadata.OMetadataDefault$1.call(OMetadataDefault.java:180)
at com.orientechnologies.orient.core.metadata.OMetadataDefault$1.call(OMetadataDefault.java:175)
at com.orientechnologies.common.concur.resource.OSharedContainerImpl.getResource(OSharedContainerImpl.java:53)
... 5 more
Caused by: com.orientechnologies.orient.core.exception.ODatabaseException: Error
on retrieving record #0:1 (cluster: internal)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.executeReadRecord(ODatabaseDocumentTx.java:1605)
at com.orientechnologies.orient.core.tx.OTransactionNoTx.loadRecord(OTransactionNoTx.java:80)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.reload(ODatabaseDocumentTx.java:1453)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.reload(ODatabaseDocumentTx.java:117)
at com.orientechnologies.orient.core.record.ORecordAbstract.reload(ORecordAbstract.java:260)
... 12 more
Caused by: java.lang.NoSuchMethodError: com.orientechnologies.common.concur.lock.ONewLockManager.tryAcquireSharedLock(Ljava/lang/Object;J)Z
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.acquireReadLock(OAbstractPaginatedStorage.java:1301)
at com.orientechnologies.orient.core.tx.OTransactionAbstract.lockRecord(OTransactionAbstract.java:120)
at com.orientechnologies.orient.core.id.ORecordId.lock(ORecordId.java:282)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.lockRecord(OAbstractPaginatedStorage.java:1784)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.readRecord(OAbstractPaginatedStorage.java:1424)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.readRecord(OAbstractPaginatedStorage.java:697)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.executeReadRecord(ODatabaseDocumentTx.java:1572)
... 16 more"
The code that I use is:
package arss;
import com.orientechnologies.orient.core.config.OGlobalConfiguration;
import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.serialization.serializer.record.ORecordSerializerFactory;
import com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary;
import com.orientechnologies.orient.core.serialization.serializer.record.string.ORecordSerializerSchemaAware2CSV;
public class db {
public static void main(String[] args) {
ODatabaseDocumentTx db = new ODatabaseDocumentTx("plocal:C:/AR/AR/Newfolder/orientdb-community-2.0.3_S/databases/GratefulDeadConcerts").open("admin", "admin");
try {
// CREATE A NEW DOCUMENT AND FILL IT
ODocument doc = new ODocument("Person");
doc.field( "name", "Luke" );
doc.field( "surname", "Skywalker" );
doc.field( "city", new ODocument("City").field("name","Rome").field("country", "Italy") );
// SAVE THE DOCUMENT
doc.save();
db.close();
} finally {
db.close();
}
}
}"
Not sure if you need .flush with ODocuments, you should look that up. (or if save is an equivalent and its okay)
from those two errors lines:
WARNING: segment file 'database.ocf' was not closed correctly last time
and
com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.executeReadRecord(ODatabaseDocumentTx.java:1572) ... 16 more"
I think it has something to do with the database.ocf file itself. dont know if this helps, but try opening it manually, preferable with/without admin and close it again. ("Have you tried turning it off and on again?")
If there is still an erorr, check if it is a different one.
I'm currently trying to acces a Webpage in Javacode using HtmlUnit. The Page has a Button, which opens a new Page when clicked. But when I try to click it, the compiler throws this exception which can be found in the attached image. As far as I understand, it has something to do with illegal escape sequences in the page's Html code.
Here is my code so far:
try(WebClient client = new WebClient(BrowserVersion.CHROME)){
client.getOptions().setCssEnabled(false);
WebRequest webRequest = new WebRequest(url);
webRequest.setCharset("utf-8");
HtmlPage entrypage = client.getPage(webRequest);
HtmlInput dwnld = (HtmlInput) entrypage.getElementById("btn_download");
long millis = System.currentTimeMillis();
while (System.currentTimeMillis() <= millis+11000) {
//Do nothing, just wait 11 seconds
}
if (dwnld != null) {
System.out.println("Found btn_download");
dwnld.click();
}
} catch (FailingHttpStatusCodeException | IOException e ) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Ideas anyone?
Here's the exception:
java.util.regex.PatternSyntaxException: Illegal octal escape sequence near index 2
\0+$
^
at java.util.regex.Pattern.error(Pattern.java:1955)
at java.util.regex.Pattern.o(Pattern.java:3192)
at java.util.regex.Pattern.escape(Pattern.java:2300)
at java.util.regex.Pattern.atom(Pattern.java:2198)
at java.util.regex.Pattern.sequence(Pattern.java:2079)
at java.util.regex.Pattern.expr(Pattern.java:1996)
at java.util.regex.Pattern.compile(Pattern.java:1696)
at java.util.regex.Pattern.<init>(Pattern.java:1351)
at java.util.regex.Pattern.compile(Pattern.java:1054)
at com.gargoylesoftware.htmlunit.javascript.regexp.HtmlUnitRegExpProxy.doAction(HtmlUnitRegExpProxy.java:102)
at com.gargoylesoftware.htmlunit.javascript.regexp.HtmlUnitRegExpProxy.action(HtmlUnitRegExpProxy.java:74)
at net.sourceforge.htmlunit.corejs.javascript.NativeString.execIdCall(NativeString.java:455)
at net.sourceforge.htmlunit.corejs.javascript.IdFunctionObject.call(IdFunctionObject.java:89)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1531)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:411)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:309)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3057)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:724)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:832)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:620)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:513)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:733)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:708)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:982)
at com.gargoylesoftware.htmlunit.html.HtmlScript.executeInlineScriptIfNeeded(HtmlScript.java:351)
at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:411)
at com.gargoylesoftware.htmlunit.html.HtmlScript$3.execute(HtmlScript.java:276)
at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:290)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:793)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:751)
at org.cyberneko.html.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1170)
at org.cyberneko.html.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1072)
at org.cyberneko.html.filters.DefaultFilter.endElement(DefaultFilter.java:206)
at org.cyberneko.html.filters.NamespaceBinder.endElement(NamespaceBinder.java:330)
at org.cyberneko.html.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3126)
at org.cyberneko.html.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2093)
at org.cyberneko.html.HTMLScanner.scanDocument(HTMLScanner.java:920)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:499)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:452)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:1017)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:248)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:194)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:268)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:156)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:471)
at com.gargoylesoftware.htmlunit.WebClient.loadDownloadedResponses(WebClient.java:2110)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.doProcessPostponedActions(JavaScriptEngine.java:875)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.processPostponedActions(JavaScriptEngine.java:962)
at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1327)
at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1270)
at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1218)
at src.Hosts$1.exctractFileLinkFrom(Hosts.java:44)
at src.TestMain.main(TestMain.java:10)
Possible solution?!
It is possible that the Error here does not lie in the frameworks Htmlparsing. My sugggestion is, that not the HtmlUnit framework itself is unable to parse illegal escape sequences but it's logger might be.
I didn't intended to solve the problem this way, but when I changed the loggers level to SEVERE to clean up my console output, there is no such exception being thrown.
Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(java.util.logging.Level.SEVERE);
Logger.getLogger("org.apache.http").setLevel(java.util.logging.Level.SEVERE);
Is my suggestion here correct or is this just coincidence?
I am using Apache Axis, and I am getting exception of type (0)null. Here is partial stack trace:
....
....
org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:281)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:120)
at java.lang.Thread.run(Thread.java:744)
Caused by: (0)null
at org.apache.axis.transport.http.HTTPSender.readFromSocket(HTTPSender.java:744)
at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:144)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
at org.apache.axis.client.Call.invoke(Call.java:2767)
at org.apache.axis.client.Call.invoke(Call.java:2443)
at org.apache.axis.client.Call.invoke(Call.java:2366)
at org.apache.axis.client.Call.invoke(Call.java:1812)
at com.netsuite.webservices.platform_2012_1.NetSuiteBindingStub.upsertList(NetSuiteBindingStub.java:11841)
....
....
Following is what I see in HTTPSender source code.
....
AxisFault fault = new AxisFault("HTTP", "(" + returnCode + ")" + statusMessage, null, null);
....
throw fault;
....
So the exception is of type AxisFault, but it looks like statusMessage is null. Line 444 is:
AxisFault fault = new AxisFault("HTTP", "(" + returnCode + ")" + statusMessage, null, null);
The (0)null part comes from "(" + returnCode + ")" + statusMessage. statusMessage itself is assigned in line 742:
String statusMessage = msgContext.getStrProp(HTTPConstants.MC_HTTP_STATUS_MESSAGE);
returnCode is set to 0 early on in the method. The next few statements should set it to its correct value:
Integer rc = (Integer) msgContext.getProperty(HTTPConstants.MC_HTTP_STATUS_CODE);
if (rc != null) {
returnCode = rc.intValue();
} else {
// No return code?? Should have one by now.
}
After this, the if block and none of the else if blocks get executed since the return code is 0 (because rc is null). It finally lands up in the else block where it generates the AxisFault exception.
You will notice that the statusMessage itself is null. The only place I can see it setting this property is on line 641, which is the readHeadersFromSocket method.
The only way the status message and the return code will not be set is if they are already null, or if there is an error earlier on in the method, which causes control to break out of the for loop that starts on line 581. Of particular interest are line 585 and line 598, both of which are if statements that will break out of the loop if their test-condition is true. One of these statements checks to see if the value of inp.read() is -1 (which means that the end of the stream has been reached), the other checks to see if the length of what was read in is 0. These conditions can hold true if there is a network error (i.e., nothing read from the socket) or if nothing was returned from the server (zero-length data). So if any of these conditions are true, control breaks out of the loop. Eventually, readFromSocket will throw the exception since it wasn't able to get a return code. But because the failure happened before it could even set an error message, you get a null error message.
tl; dr; There is probably some sort of network/read error.
Error:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at test.factory.MainWindow.setFuncList(MainWindow.java:160)
at test.factory.MainWindow.<init>(MainWindow.java:22)
at test.factory.MainWindow$2.run(MainWindow.java:151)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:691)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)
Code:
TestFactory tf = new TestFactory();
ArrayList<Function> fList = tf.getFunctions();
DefaultListModel<Function> dFuncList = new DefaultListModel();
fListPane.setModel(dFuncList);
for(Function f : fList) {
dFuncList.addElement(f);
}
Question:
Now, if you find the error that's great, but my question is. How do I parse the error text to find where my error originated? I'm used to things like missing ';' at line 24 of C:\filename
Update: fList has two elements, so not null.
The error dump is a stack trace, so I tend to find it's always best to start at the top and work down. In this case it looks like your setFuncList at line 160 of MainWindow.java is trying to work with an object that is null (maybe not yet initialised?).
UPDATE: Example of code that works
class Function {
int i;
public Function(int myI) {
this.i = myI;
}
#Override
public String toString() {
return "i=" + this.i;
}
}
Used with:
ArrayList<Function> fList = new ArrayList<>();
fList.add(new Function(1));
fList.add(new Function(2));
DefaultListModel<Function> dFuncList = new DefaultListModel();
jList2.setModel(dFuncList);
for(Function f : fList) {
dFuncList.addElement(f);
}
So basically look through the stack trace from the top, it will list the calls that have occurred which led to the error you received. Look carefully at the lines in your code that are listed. If you can't see any obvious errors you can add some extra tests based on the error. Ie check some objects are not null before the line which caused the error, I find printouts a simple approach. You can also use a debugger, I use jswat but only break it out when I really need to.
Hope that was what you were after
#orangegoat gave a good breakdown of how to interpret the stack trace if that's what you wanted
Also a link to jswat
http://code.google.com/p/jswat/