java - NullPointerException in filter from Ajax Request -

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i've migrate apache nginx web server. since that, npe error filters on ajax request : 

java.lang.nullpointerexception @ org.ulpmm.eev.web.administration.modifyelevedossierutilisateur.verificationdateentree(modifyelevedossierutilisateur.java:340) @ org.ulpmm.eev.web.administration.modifyelevedossierutilisateur.modifyuser(modifyelevedossierutilisateur.java:175) @ org.ulpmm.eev.web.administration.modifyelevedossierutilisateur.doprocess(modifyelevedossierutilisateur.java:142) @ org.ulpmm.eev.web.administration.modifyelevedossierutilisateur.dopost(modifyelevedossierutilisateur.java:91) @ javax.servlet.http.httpservlet.service(httpservlet.java:641) @ javax.servlet.http.httpservlet.service(httpservlet.java:722) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:305) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210) @ org.ulpmm.eev.utils.setcharacterencodingfilter.dofilter(setcharacterencodingfilter.java:125) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:243) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210) @ org.ulpmm.eev.filter.realipfilter.dofilter(realipfilter.java:19) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:243) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210)

here realipfilter.java : 

public void dofilter(servletrequest request, servletresponse response, filterchain chain) throws ioexception, servletexception {         if (chain != null) {             if (request instanceof httpservletrequest) {                 realiprequestwrapper rirw = new realiprequestwrapper((httpservletrequest) request);                 chain.dofilter(rirw, response);             } else {                 chain.dofilter(request, response);             }         }     }

line 19 1 chain.dofilter(rirw, response);

and setcharacterencodingfilter :

public void dofilter(servletrequest request, servletresponse response,                          filterchain chain)         throws ioexception, servletexception {          // conditionally select , set character encoding used         /*         if (ignore || (request.getcharacterencoding() == null)) {             string encoding = selectencoding(request);             if (encoding != null)                 request.setcharacterencoding(encoding);         }         */         request.setcharacterencoding("utf-8");         // pass control on next filter         if (chain != null) {             chain.dofilter(request, response);         }      }

line 125 1 chain.dofilter(request, response).

i thought npe on chain added test there no change.

it seems occur ajax request. except them don't error.

it great if have clue :)

thank you.

marc

as told @marthusson , @seelenvirtuose, npe thrown in data process classes , not in filters.

the filters relays.

by fixing classes fine.

thank :)


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