java.lang.NullPointerException when converting DocX to html

[ZidZabre]

Stack
org.apache.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.convert(XHTMLConverter.java:77)
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:63)
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:38)
at org.apache.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:45)
at [Redacted].DocImport.StringDOCXImport(DocImport.java:270)

Olika program att använda sig utav med GTD för att få det enklare i vardagen.docx

including docx file.

Any ideas on whats causing this?

[pensionarchitects-ben]

If you send the whole Stacktrace this could be found

[ZidZabre]

org.apache.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.convert(XHTMLConverter.java:77)
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:63)
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:38)
at org.apache.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:45)
at [Redacted].DocImport.StringDOCXImport(DocImport.java:270)
at [Redacted].GuideLogic.DocxToTextGuide(GuideLogic.java:725)
at [Redacted].GuideRest.convert(GuideRest.java:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:151)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:171)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:195)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:104)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:387)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:331)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:103)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:297)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:254)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1030)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:373)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:381)
at org.glassfish.jersey.servlet.ServletContainer.doFilter(ServletContainer.java:534)
at org.glassfish.jersey.servlet.ServletContainer.doFilter(ServletContainer.java:482)
at org.glassfish.jersey.servlet.ServletContainer.doFilter(ServletContainer.java:419)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:89)
at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:119)
at com.google.inject.servlet.GuiceFilter$1.call(GuiceFilter.java:133)
at com.google.inject.servlet.GuiceFilter$1.call(GuiceFilter.java:130)
at com.google.inject.servlet.GuiceFilter$Context.call(GuiceFilter.java:203)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:130)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at [Redacted].doFilter([Redacted].java:83)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

[pensionarchitects-ben]

I need to know where the null pointer happens, this stacktrace is still incomplete

[ZidZabre]

that is the trace i get out of it.

[pensionarchitects-ben]

Can you debug it and check where the null pointer happens?

[ZidZabre]

my appalogies seems i forgot to add this:

Caused by: java.lang.NullPointerException
at org.apache.poi.xwpf.converter.core.utils.XWPFTableUtil.getWidth(XWPFTableUtil.java:273)
at org.apache.poi.xwpf.converter.core.utils.XWPFTableUtil.computeColWidths(XWPFTableUtil.java:284)
at org.apache.poi.xwpf.converter.core.utils.XWPFTableUtil.computeColWidths(XWPFTableUtil.java:127)
at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTable(XWPFDocumentVisitor.java:867)
at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:251)
at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.start(XWPFDocumentVisitor.java:199)
at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.convert(XHTMLConverter.java:73)
... 60 more

Also the document enclosed causes this error, as other documents doesn't.
also code snippet:

        XWPFDocument document = new XWPFDocument(in);
        XHTMLOptions options = XHTMLOptions.create();
        XHTMLConverter.getInstance().convert(document, out, options);

input and output streams is defined. and as stated before, other docx documents works without issues, but some others causes this.

[pensionarchitects-ben]

Looks like something weird, there doesn't seem to be a table in the document. Still it tries to parse one. Btw which version of XDocReport are you using? Can you remake your document part for part and fix this problem. By doing that you can find out what part of the document causes the error. I do not have expertise with the DOCX to XWPF converter, maybe just wait for @angelozerr to come by.

[shuanshuan]

Is this fixed, I have the same problem

[max-young]

I have the same problem, here is my code:

XHTMLConverter.getInstance().convert(docxDocument, htmlStream, options)

error information:

org.apache.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException
	at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.convert(XHTMLConverter.java:77)
	at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:63)
	at org.apache.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:38)
	at org.apache.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:45)
	at com.ksxing.common.utils.OfficeToolService.uploadDocxToHtml(OfficeToolService.java:71)

[x0zh]

I have the same problem, here is the stacktrace:

fr.opensagres.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException

	at fr.opensagres.poi.xwpf.converter.xhtml.XHTMLConverter.convert(XHTMLConverter.java:78)
	at fr.opensagres.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:64)
	at fr.opensagres.poi.xwpf.converter.xhtml.XHTMLConverter.doConvert(XHTMLConverter.java:39)
	at fr.opensagres.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:62)
// ...
Caused by: java.lang.NullPointerException
	at fr.opensagres.poi.xwpf.converter.core.utils.XWPFTableUtil.getGridColList(XWPFTableUtil.java:173)
	at fr.opensagres.poi.xwpf.converter.core.utils.XWPFTableUtil.computeColWidths(XWPFTableUtil.java:106)
	at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTable(XWPFDocumentVisitor.java:970)
	at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:267)
	at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.start(XWPFDocumentVisitor.java:215)
	at fr.opensagres.poi.xwpf.converter.xhtml.XHTMLConverter.convert(XHTMLConverter.java:74)
	... 27 more

I debug it and find the null pointer happens in fr.opensagres.poi.xwpf.converter.core.utils.XWPFTableUtil#computeColWidths()

[mp-loki]

Having the same problem. grid is null for some reason and no clue how it should be initialized

[badmalloc]

Any updates for this bug?

[lwlach]

I have the same problem. I notice it only happens when the document is generated um apache poi. If eu edit in any way the docx file in word and try to convert after, it works. Somehow the API is not filling all table fileds and causa these null pointers

[ezelorenzatti]

I have the same problem, the document has a table created with apache poi 4.0.1 and CTTblGrid is null

java.lang.NullPointerException: null at fr.opensagres.poi.xwpf.converter.core.utils.XWPFTableUtil.getGridColList(XWPFTableUtil.java:184) ~[fr.opensagres.poi.xwpf.converter.core-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.core.utils.XWPFTableUtil.computeColWidths(XWPFTableUtil.java:117) ~[fr.opensagres.poi.xwpf.converter.core-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTable(XWPFDocumentVisitor.java:970) ~[fr.opensagres.poi.xwpf.converter.core-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:267) ~[fr.opensagres.poi.xwpf.converter.core-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.start(XWPFDocumentVisitor.java:215) ~[fr.opensagres.poi.xwpf.converter.core-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:57) ~[fr.opensagres.poi.xwpf.converter.pdf-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:39) ~[fr.opensagres.poi.xwpf.converter.pdf-2.0.2.jar:2.0.2] at fr.opensagres.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:46) ~[fr.opensagres.poi.xwpf.converter.core-2.0.2.jar:2.0.2]

[Xiaoshu-Zhao]

I got the same issue and I solved it. The following are the steps I did and hope it is helpful.

First of all, XWPFConverterException is confused and not helpful to debug because it is throwed by many different errors. Here is the source code:

As we can see, any error occur during convert process may throw XWPFConverterException.

However, I used the debug mode and found the error occur in ListItemContext class which package path is fr.opensagres.poi.xwpf.converter.core. The method getText are following:

    public String getText() {
        String text = this.lvl.getLvlText().getVal();
        CTNumFmt numFmt = this.lvl.getNumFmt();
        if (!STNumberFormat.BULLET.equals(numFmt)) {
            List<String> numbers = new ArrayList();

            for (ListItemContext item = this; !item.isRoot(); item = item.getParent()) {
                numbers.add(0, item.getNumberText());
            }

            String num = null;

            for (int i = 0; i < numbers.size(); ++i) {
                if (numbers.get(i) instanceof String) {
                    num = (String) numbers.get(i);
                }
                text = StringUtils.replaceAll(text, "%" + (i + 1), num);
            }
        }

        return text;
    }

And I found String text = this.lvl.getLvlText().getVal(); is the root cause. this.lvl.getLvlText() can be null and then it will throw NullPointerException. So I just add the following code at the begin of the method.

if (this.lvl == null || this.lvl.getLvlText() == null) {
            return "";
        }

Then I can convert Docx to html without any problem.

[Xiaoshu-Zhao]

I got the same issue and I solved it. The following are the steps I did and hope it is helpful.

First of all, XWPFConverterException is confused and not helpful to debug because it is throwed by many different errors. Here is the source code: As we can see, any error occur during convert process may throw XWPFConverterException.

However, I used the debug mode and found the error occur in ListItemContext class which package path is fr.opensagres.poi.xwpf.converter.core. The method getText are following:

    public String getText() {
        String text = this.lvl.getLvlText().getVal();
        CTNumFmt numFmt = this.lvl.getNumFmt();
        if (!STNumberFormat.BULLET.equals(numFmt)) {
            List<String> numbers = new ArrayList();

            for (ListItemContext item = this; !item.isRoot(); item = item.getParent()) {
                numbers.add(0, item.getNumberText());
            }

            String num = null;

            for (int i = 0; i < numbers.size(); ++i) {
                if (numbers.get(i) instanceof String) {
                    num = (String) numbers.get(i);
                }
                text = StringUtils.replaceAll(text, "%" + (i + 1), num);
            }
        }

        return text;
    }

And I found String text = this.lvl.getLvlText().getVal(); is the root cause. this.lvl.getLvlText() can be null and then it will throw NullPointerException. So I just add the following code at the begin of the method.

if (this.lvl == null || this.lvl.getLvlText() == null) {
            return "";
        }

Then I can convert Docx to html without any problem.

this problem should be solved. Check this link for detail: #638