XMLA fails to be read if a prior schema is not valid due to a broken jdbc connection

In order to replicate this issue please follow these steps:

In 5.2 Data Access Manager edit the Analysis type connection for Sample Data and change EnableXmla to true
Upload the attached xaction: 51_CallOlapInput.xaction
Upload the attached ktr: 51_SampleOlap.ktr (make sure the URL in the ktr matches the one for your server)
Note the ktr uses the OLAP Input step with the following query:
select
NON EMPTY Hierarchize(Union(Crossjoin(

{[Measures].[Actual]}, Union(Crossjoin({[Region].[All Regions]}, {[Department].[All Departments]}),
Crossjoin({[Region].[All Regions]}, [Department].[All Departments].Children))), Crossjoin({[Measures].[Actual]}

,
Union(Crossjoin([Region].[All Regions].Children,

{[Department].[All Departments]}

), Crossjoin([Region].[All Regions].Children, [Department].[All Departments].Children))))) ON COLUMNS,
NON EMPTY Hierarchize(Union(

{[Positions].[All Positions]}

, [Positions].[All Positions].Children)) ON ROWS
from [Quadrant Analysis]

Although using XMLA over a PDI Olap input seems redundate please see ESR-3711

Set up a JDBC connection to a local Foodmart MySQL Database
Upload the attached Foodmart schema
Execute the 51_CallOlapInput.xaction and see the report as shown in the attached screenshot
Clear Mondrian Schema Cache

Stop your MySQL Server
If you run the xaction you will get the following exception on the Pentaho log:

2014-10-27 13:40:45,502 DEBUG [mondrian.xmla.XmlaServlet] XML/A response content
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" >
<SOAP-ENV:Header>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<SOAP-ENV:Fault>
<faultcode>SOAP-ENV:Server.00HSBE02</faultcode>
<faultstring>XMLA Discover unparse results error</faultstring>
<faultactor>Mondrian</faultactor>
<detail>
<XA:error xmlns:XA="http://mondrian.sourceforge.net">
<code>00HSBE02</code>
<desc>The Mondrian XML: Software caused connection abort: recv failed</desc>
</XA:error>
</detail>
</SOAP-ENV:Fault>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Please see attached screencast:

https://pentaho.viewscreencasts.com/embed/03daed8a5fa64ebdb0ee51c514b4ed1f