Orbeon Forms 2020.1 - Error uploading in new File Attachment control

Hello, I have updated to the latest Orbeon Forms 2020.1 version and it gives
this error when trying to load a file in the new control. This error occurs
in the docker environment and not on a localhost with tomcat. The previous
version did not give any problem in the docker environment. I attach the
error.
Thanks a lot.

2021-01-19 15:02:32,108 ERROR XFormsServer  -
+----------------------------------------------------------------------------------------------------------------------+
|An Error has Occurred                                                                                                
|
|----------------------------------------------------------------------------------------------------------------------|
|Unexpected incoming value for `xf:upload`:
`file:/opt/tomcat/appsrv1/apache-tomcat-8.5.32/temp/xforms_upload_798558459|
|4589676341.tmp`                                                                                                      
|
|----------------------------------------------------------------------------------------------------------------------|
|Application Call Stack                                                                                              
|
|----------------------------------------------------------------------------------------------------------------------|
|----------------------------------------------------------------------------------------------------------------------|
|Exception: org.orbeon.oxf.common.OXFException                                                                        
|
|----------------------------------------------------------------------------------------------------------------------|
|eon.oxf.xforms.control.controls.XFormsUploadControl|storeExternalValueAndMetadata
|XFormsUploadControl.scala     | 145|
|----------------------------------------------------------------------------------------------------------------------|
|Exception: org.orbeon.oxf.common.ValidationException                                                                
|
|----------------------------------------------------------------------------------------------------------------------|
|eon.oxf.xforms.control.controls.XFormsUploadControl|storeExternalValueAndMetadata
|XFormsUploadControl.scala     | 202|
|eon.oxf.xforms.control.controls.XFormsUploadControl|handleUploadedFile          
|XFormsUploadControl.scala     | 126|
|eon.oxf.xforms.control.controls.XFormsUploadControl|performTargetAction          
|XFormsUploadControl.scala     |  90|
|org.orbeon.oxf.xforms.event.Dispatch$            
|$anonfun$dispatchEvent$8      |Dispatch.scala                | 116|
|scala.runtime.java8.JFunction0$mcV$sp              |apply                        
|JFunction0$mcV$sp.java        |  23|
|org.orbeon.oxf.util.Logging                        |withDebug                    
|Logging.scala                 |  50|
|org.orbeon.oxf.util.Logging                        |withDebug$                  
|Logging.scala                 |  45|
|org.orbeon.oxf.xforms.event.Dispatch$              |withDebug                    
|Dispatch.scala                |  29|
|org.orbeon.oxf.xforms.event.Dispatch$            
|$anonfun$dispatchEvent$5      |Dispatch.scala                |  78|
|scala.runtime.java8.JFunction0$mcV$sp              |apply                        
|JFunction0$mcV$sp.java        |  23|
|org.orbeon.oxf.xforms.event.Dispatch$              |withEvent$1                  
|Dispatch.scala                |  44|
|org.orbeon.oxf.xforms.event.Dispatch$              |dispatchEvent                
|Dispatch.scala                |  76|
|org.orbeon.oxf.xforms.event.ClientEvents$        
|dispatchEventCheckTarget$1    |ClientEvents.scala            | 374|
|org.orbeon.oxf.xforms.event.ClientEvents$          |$anonfun$processEvent$9      
|ClientEvents.scala            | 420|

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Hi Pedro,

What have you set your temporary directory to be (value of the
`java.io.tmpdir` property)? Is it by any chance something different than
`/opt/tomcat/appsrv1/apache-tomcat-8.5.32/temp`, like a symlink that points
to the same place?

If so, try setting it exactly to
`/opt/tomcat/appsrv1/apache-tomcat-8.5.32/temp`. The reason for this is that
Orbeon Forms checks, for security reasons, that the temporary file it is
trying to read from is indeed in the temporary directory set with
`java.io.tmpdir`, and that this check can fail if using symlinks.

-Alex

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Thanks a lot. Solved with your indications.

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Perfect Pedro, I'm glad that was it, and thank you for the update.

-Alex

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