[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PULL 11/20] iotests: Make 083 less flaky

From: Max Reitz
Subject: [Qemu-devel] [PULL 11/20] iotests: Make 083 less flaky
Date: Tue, 14 Nov 2017 18:24:08 +0100

083 has (at least) two issues:

1. By launching the nbd-fault-injector in background, it may not be
   scheduled until the first grep on its output file is executed.
   However, until then, that file may not have been created yet -- so it
   either does not exist yet (thus making the grep emit an error), or it
   does exist but contains stale data (thus making the rest of the test
   case work connect to a wrong address).
   Fix this by explicitly overwriting the output file before executing

2. The nbd-fault-injector prints things other than "Listening on...".
   It also prints a "Closing connection" message from time to time.  We
   currently invoke sed on the whole file in the hope of it only
   containing the "Listening on..." line yet.  That hope is sometimes
   shattered by the brutal reality of race conditions, so make the sed
   script more robust.

Signed-off-by: Max Reitz <address@hidden>
Message-id: address@hidden
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Max Reitz <address@hidden>
 tests/qemu-iotests/083 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/083 b/tests/qemu-iotests/083
index 0306f112da..3c1adbf0fb 100755
--- a/tests/qemu-iotests/083
+++ b/tests/qemu-iotests/083
@@ -86,6 +86,7 @@ EOF
        rm -f "$TEST_DIR/nbd.sock"
+        echo > "$TEST_DIR/nbd-fault-injector.out"
        $PYTHON nbd-fault-injector.py $extra_args "$nbd_addr" 
"$TEST_DIR/nbd-fault-injector.conf" >"$TEST_DIR/nbd-fault-injector.out" 2>&1 &
        # Wait for server to be ready
@@ -94,7 +95,8 @@ EOF
        # Extract the final address (port number has now been assigned in tcp 
-       nbd_addr=$(sed 's/Listening on \(.*\)$/\1/' 
+        nbd_addr=$(sed -n 's/^Listening on //p' \
+                       "$TEST_DIR/nbd-fault-injector.out")
        if [ "$proto" = "tcp" ]; then

reply via email to

[Prev in Thread] Current Thread [Next in Thread]