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fork: Resource temporarily unavailable

It seems that somewhere between cygwin 1.5.19-4 and 1.5.21-2 some change was
made that causes this error.   I have a bash script that is used to create a
number of client processes that run in parallel and generate TCP/IP
conversations with a remote server being tested   This script can configure
and run any number of these clients executing simultaneously.  The clients
can be either .exe files based on .NET or a JVM (.exe) running a Java-based
client.   These scripts run flawlessly on Linux or Solaris (java clients
only) or on a Win2K Professional box running cygwin 1.5.19-4 (both java or
.NET clients)   They were also running flawlessly on a Win2K Server, until
it got upgraded to cygwin   After that, the scripts run for a
while until the message "fork: Resource temporarily unavailable" occurs, at
which point there are all sorts of bizarre and unexplainable failures.  If
run for a reasonable amount of time these scripts will always result in this
error message.

The obvious question is,  "How can we revert the Win2K Server back to cygwin so that we can continue to run tests from this machine?

Alternatively, is there fix or patch available for this?

I have attached the output of cygcheck for both machines.  

Attachment: w2ks.cygcheck.out
Description: Binary data

Attachment: w2kp.cygcheck.out
Description: Binary data

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