Frank Ch. Eigler
Thu Jun 17 01:42:20 GMT 2021


About to commit this.  It explains/solves the intermittent race
condition seen on some build systems.  There is still a
valgrind-related problem, but that's something else.

commit e113a61bc0537e485fbe7769f1ef0ebf02ac5e00 (HEAD -> master)
Author: Frank Ch. Eigler <>
Date:   Wed Jun 16 18:49:10 2021 -0400

    debuginfod test: fix groom/stale race condition
    Additional tracing, and use of "% make check VERBOSE=1" in a .spec
    file allowed tracking down of this intermittent problem.  The race was
    between a SIGUSR1 or two to a debuginfod server (triggering two
    traverse/scan phases), followed shortly by a SIGUSR2 (triggering a
    groom).  If those signals were received too close together, the groom
    phase could be stopped early, and the rm'd files not noticed.
    New testsuite code adds metric polls after SIGUSR1 & SIGUSR2 to ensure
    the respective processing phases are complete.  It also turns on "set -x"
    tracing, so as to avoid pulling out quite as much hair next time.
    "make check VERBOSE=1" is also important for spec files.
    Signed-off-by: Frank Ch. Eigler <>

diff --git a/tests/ChangeLog b/tests/ChangeLog
index c02fb050aab9..d8fa97fa892c 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-16  Frank Ch. Eigler <>
+	* Fix intermittent groom/stale failure,
+	due to SIGUSR1/SIGUSR2 races.  Trace more.
 2021-06-15  Frank Ch. Eigler <>
 	* (err): Elaborate.  Use as the reliable
diff --git a/tests/ b/tests/
index c9ee11b1f24a..456dc2f812e2 100755
--- a/tests/
+++ b/tests/
@@ -26,7 +26,7 @@ bsdtar --version | grep -q zstd && zstd=true || zstd=false
 echo "zstd=$zstd bsdtar=`bsdtar --version`"
 # for test case debugging, uncomment:
-#set -x
+set -x
@@ -74,7 +74,6 @@ errfiles() {
 # find an unused port number
 while true; do
     PORT1=`expr '(' $RANDOM % 1000 ')' + 9000`
@@ -317,6 +316,11 @@ fi
 cp -rvp ${abs_srcdir}/debuginfod-tars Z
 kill -USR1 $PID1
+# Wait till both files are in the index and scan/index fully finished
+wait_ready $PORT1 'thread_work_total{role="traverse"}' 4
+wait_ready $PORT1 'thread_work_pending{role="scan"}' 0
+wait_ready $PORT1 'thread_busy{role="scan"}' 0
 # All rpms need to be in the index, except the dummy permission-000 one
 rpms=$(find R -name \*rpm | grep -v nothing | wc -l)
 wait_ready $PORT1 'scanned_files_total{source=".rpm archive"}' $rpms
@@ -326,6 +330,11 @@ tb2=$(find Z -name \*tar.bz2 | wc -l)
 wait_ready $PORT1 'scanned_files_total{source=".tar.bz2 archive"}' $tb2
 kill -USR1 $PID1  # two hits of SIGUSR1 may be needed to resolve .debug->dwz->srefs
+# Wait till both files are in the index and scan/index fully finished
+wait_ready $PORT1 'thread_work_total{role="traverse"}' 5
+wait_ready $PORT1 'thread_work_pending{role="scan"}' 0
+wait_ready $PORT1 'thread_busy{role="scan"}' 0
 # Expect all source files found in the rpms (they are all called hello.c :)
 # We will need to extract all rpms (in their own directory) and could all
 # sources referenced in the .debug files.
@@ -495,6 +504,10 @@ if type bsdtar 2>/dev/null; then
     # copy in the deb files
     cp -rvp ${abs_srcdir}/debuginfod-debs/*deb D
     kill -USR1 $PID2
+    wait_ready $PORT2 'thread_work_total{role="traverse"}' 2
+    wait_ready $PORT2 'thread_work_pending{role="scan"}' 0
+    wait_ready $PORT2 'thread_busy{role="scan"}' 0
     # All debs need to be in the index
     debs=$(find D -name \*.deb | wc -l)
     wait_ready $PORT2 'scanned_files_total{source=".deb archive"}' `expr $debs`

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