ServiceRequestBase.readResponse() NullPointerException

[philci52]

Stacktrace below, The issue is that HttpWebRequest.getContentEncoding() can return null, but null is not checked for in ServiceRequestBase.readResponse():369

With trace on, the response received was:
302 null
Server : BigIP
Connection : Close
Set-Cookie : LastMRH_Session=e8cc4bb9;path=/;secure,MRHSession=d37d34cd1b78cbca2a575266e8cc4bb9;path=/;secure,MRHSHint=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/
Content-Length : 0
Location : /my.policy

Caused by: microsoft.exchange.webservices.data.core.exception.service.remote.ServiceRequestException: The request failed. null at microsoft.exchange.webservices.data.core.request.SimpleServiceRequestBase.internalExecute(SimpleServiceRequestBase.java:74) at microsoft.exchange.webservices.data.core.request.MultiResponseServiceRequest.execute(MultiResponseServiceRequest.java:158) at microsoft.exchange.webservices.data.core.ExchangeService.bindToFolder(ExchangeService.java:505) at microsoft.exchange.webservices.data.core.ExchangeService.bindToFolder(ExchangeService.java:523) at microsoft.exchange.webservices.data.core.service.folder.Folder.bind(Folder.java:98) at microsoft.exchange.webservices.data.core.service.folder.Folder.bind(Folder.java:147) ... 9 more Caused by: java.lang.NullPointerException at microsoft.exchange.webservices.data.core.request.ServiceRequestBase.readResponse(ServiceRequestBase.java:369) at microsoft.exchange.webservices.data.core.request.SimpleServiceRequestBase.internalExecute(SimpleServiceRequestBase.java:63)

[Intelligent2013]

I've had the same issue. I use rackspace exchange email service and when I set recomended URL https://mex09.emailsrvr.com, then I get above exception.
302 is response code and it means that response body contains a redirection (new) location, but looks like that this library doesn't support redirection. Therefore you have to set URL in code to URL from location value. But in my case it didn't help me and I get error 440 (login timeout). (But in any case the correct URL for rackspace is https://mex09.emailsrvr.com/EWS/Exchange.asmx)

[yw411]

@Intelligent2013 ,I meet the same error 440(login timeout).Did you solve the error?

[Intelligent2013]

@yw411 Yes, I've solved this issue by using URL https://mex09.emailsrvr.com/EWS/Exchange.asmx instead of recommended https://mex09.emailsrvr.com (I've used rackspace email service). In your case try to use more concrete URL (with .asmx on the end).

[yw411]

@Intelligent2013 ,I have tried the url but still error 440. I think maybe the exchange server's configuration is not correct, so if there are something that I have to pay attention to (for example: authentication)

[philci52]

Even if people solve this by using a different URL, the library should not generate NPE if the proper header is not returned.