NullPointerException when uploading file

[xml-leo]

Hi, I faced the problem as description in these threads

1. http://forums.smartclient.com/showthread.php?t=7437
2. http://forums.smartclient.com/showthread.php?t=8967

I found the root cause it is because the DSRequest instanced by other threads

e.g.
in TaxDMI.java

public void update(Tax tax, DSRequset dsRequest){
.....

taxService.processTax(tax, dsRequest); // taxService is a SpringBean

......
}

in TaxService.java

public void processTax(Tax tax, DSRequest dsRequest){
.....
}

if I removed the param 'dsRequest' from #processTax in TaxService, then this problem resolved.

But I had no idea why this would side effect on var Config in com.isomorphic.datasource.DSRequest

my version is SISV 6.5.1