SRS Report CustAccountStatement is hanging with Suspended Process in AX 2012 CU-2

We recently came across an issue on Microsoft Dynamics AX 2012 RTM CU-2.  When we try to run the report "Accounts receivable\reports\external\customer account statement", AX ends up hanging. This happens in every environment if I just choose a customer account and leave all else as default.

The reason we found was:

In \Classes\SrsReportRunRdpPreProcessService, executeWithContract method, there are some code shown below, there is a UserConnection ttsBegin and UserConnection ttsCommit pair embedded in global ttsBegin and ttsCommit pair, this makes the database write operation to hang.

// switch company to that user. 
 changecompany(companyId) 
 { 
 
 // check if any pre-processing id already exists, if yes, then call cleanup, this will take care of cleaning up left over data. 
 if(_preProcessedRecId) 
 { 
 this.cleanUp(_preProcessedRecId, reportContract.parmRdpName()); 
 } 
 
 
 // starting a default transaction, since some RDP classes do delete as part of their code and they dont have a explicit ttsbegin/ttscommit.
 // they were relying on the old behvior of SrsReportRunRdpPreProcessService class starting a default ttsbegin/commit.
 
 
 ttsBegin; 
 
 
 // We start transaction before calling processReport. By doing so, all data 
 // inserted by RDP into table will have the same transactionId. 
 // Always use a UserConnection. The service is currently running on RPC call and hence if outer transaction exists we dont want it to be used. 
 
 
 userConnection = new UserConnection(true); 
 userConnection.ttsbegin(); 
 
 
 // set user connection on RDP class. 
 rdpInstance.parmUserConnection(userConnection); 
 
 
 // call processReport 
 rdpInstance.processReport(); 
 
 
 // now create a entry in table with report name etc. 
 // transactionId will be same as the one used in processReport(). 
 preProcessedTable = SrsReportPreProcessedDetails::create(reportContract.parmRdpName(), userConnection, _isPreviewData);
 
 
 // commit the transaction. 
 userConnection.ttscommit(); 
 ttsCommit; 
 }
 

To workaround, the suggestion is to comment out those inner transactions, so that code looks as given in the highlighted sections below:

// switch company to that user. 
 changecompany(companyId) 
 { 
 
 
 // check if any pre-processing id already exists, if yes, then call cleanup, this will take care of cleaning up left over data. 
 if(_preProcessedRecId) 
 { 
 this.cleanUp(_preProcessedRecId, reportContract.parmRdpName()); 
 } 
 
 
 // starting a default transaction, since some RDP classes do delete as part of their code and they dont have a explicit ttsbegin/ttscommit.
 // they were relying on the old behvior of SrsReportRunRdpPreProcessService class starting a default ttsbegin/commit.
 ttsBegin; 
 
 
 // We start transaction before calling processReport. By doing so, all data 
 // inserted by RDP into table will have the same transactionId. 
 // Always use a UserConnection. The service is currently running on RPC call and hence if outer transaction exists
 // we dont want it to be used. 
 
 
 userConnection = new UserConnection(true); 
 //userConnection.ttsbegin();
 
 // set user connection on RDP class. 
 rdpInstance.parmUserConnection(userConnection); 
 
 
 // call processReport 
 rdpInstance.processReport(); 
 
 
 // now create a entry in table with report name etc. 
 // transactionId will be same as the one used in processReport(). 
 preProcessedTable = SrsReportPreProcessedDetails::create(reportContract.parmRdpName(), userConnection, _isPreviewData);
 
 
 // commit the transaction. 
 //userConnection.ttscommit(); 
 ttsCommit; 
 }