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81b052c317
Attempting to open a file fails with ERROR_ACCESS_DENIED if the file is flagged for deletion but not yet actually gone (another in a long list of reasons why Windows is broken, if you ask me). This seems likely to explain a lot of irreproducible failures we see in the buildfarm. This state generally persists for only a millisecond or so, so just wait a bit and retry. If it's a real permissions problem, we'll eventually give up and report it as such. If it's the pending deletion case, we'll see file-not-found and report that after the deletion completes, and the caller will treat that in an appropriate way. In passing, rejigger the existing retry logic for some other error cases so that we don't uselessly wait an extra time when we're not going to retry anymore. Alexander Lakhin (with cosmetic tweaks by me). Back-patch to all supported branches, since this seems like a pretty safe change and the problem is definitely real. Discussion: https://postgr.es/m/16161-7a985d2f1bbe8f71@postgresql.org |
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