[Exist-development] Fwd: Errors from Stress tests on xquery update

[Wolfgang M. <wol...@ex...>]

Hi Casey,

the NullPointerException in your logs occur after the corresponding
documents have been locked. It thus seems the locking did fail or miss
some nodes for unknown reasons and the update tried to operate on a
node which was deleted.

To avoid such issues, it might help to explicitely put a lock on the
documents before you start the actual modifications. There's a
(pseudo-) function: util:exclusive-lock($nodes as node()*, $expression
as item()*) item()*. It takes a sequence of nodes from documents to be
locked and acquires an exclusive lock before it executes the code
block given in $expression.

Wolfgang