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ITsVISTA KB-Link: KB953603

When an SUA process forks a child process on a Windows Vista-based computer, the child process is unexpectedly marked as a zombie process

Consider the following scenario. On a Windows Vista-based computer, a Subsystem for UNIX-based Applications (SUA) process forks a child process. Because the SUA process is not required to wait for the child process to be completed, the SUA process sets the value of the SIGCHILD signal to SIG_IGN. In this scenario, the SUA process expects the child process to be cleared when the child process is complete. However, the child process is unexpectedly marked as a zombie process instead.

There is a download that resolves this issue. See Hotfixes for details.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB953603.

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