[Qemu-devel] testsuite spurious failure due to leftover files

[Eric Blake <eblake@redhat.com>]

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iotests ./check -qcow2 failed for me today:

191      fail       [10:46:04] [10:46:13]   0s (last: 7s)    output
mismatch (see 191.out.bad)
--- /home/eblake/qemu/tests/qemu-iotests/191.out	2019-05-24
09:27:46.449348997 -0500
+++ /home/eblake/qemu/tests/qemu-iotests/191.out.bad	2019-06-13
10:46:13.906004319 -0500
@@ -8,6 +8,8 @@
 Formatting 'TEST_DIR/t.IMGFMT.ovl2', fmt=IMGFMT size=67108864
backing_file=TEST_DIR/t.IMGFMT.mid
 wrote 65536/65536 bytes at offset 1048576
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+mkfifo: cannot create fifo
'/home/eblake/qemu/tests/qemu-iotests/scratch/qmp-out-17782_0': File exists
+mkfifo: cannot create fifo
'/home/eblake/qemu/tests/qemu-iotests/scratch/qmp-in-17782_0': File exists
 {
     "return": {
     }

If someone wants a good project to take on - it would be nice to revive
Jeff Cody's initial work on refactoring the iotests to operate with one
directory per test, allowing things to be run in parallel, and allowing
cleanup to be much easier (nuke the temp directories, rather than trying
to track down which test left a possibly-colliding file name behind)

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org


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