merge_sth: Don't try to go back in time.

Due to a recent change in get_nfetched(), merge_sth lacking the 'sth'
file could go back to a tree size of zero. It's rejected by frontend
nodes with a newer tree, but it's still a severe error to produce that
piece of data.

We add tools/initlog.py which creates an 'sth' file with tree size 0
and have tests invoke it after starting the erlang nodes, before
starting the continous merge processes.

2 files changed, 6 insertions, 1 deletions

diff --git a/test/scripts/continuous-merge-test.sh b/test/scripts/continuous-merge-test.sh
index 3bb6de2..1e944b6 100755
--- a/test/scripts/continuous-merge-test.sh
+++ b/test/scripts/continuous-merge-test.sh
@@ -5,12 +5,13 @@ set -o errexit
 
 top_srcdir=$(cd $(dirname $0)/../..; pwd)
 
-. ${top_srcdir}/test/test.shvars
+. ${top_srcdir}/test/scripts/testutils.sh
 
 SCRIPTS=${top_srcdir}/test/scripts
 
 tests_start() {
     ${SCRIPTS}/light-system-test-start.sh
+    init_log
     ${SCRIPTS}/continuous-merge-start.sh &
 }
 
diff --git a/test/scripts/testutils.sh b/test/scripts/testutils.sh
index faa7026..ecefe2b 100644
--- a/test/scripts/testutils.sh
+++ b/test/scripts/testutils.sh
@@ -30,3 +30,7 @@ check_sth() {
 do_merge() {
     ${top_srcdir}/tools/merge --config ${top_srcdir}/test/catlfish-test.cfg --timing --localconfig ${top_srcdir}/test/catlfish-test-local-merge.cfg $@ || fail "Merge failed"
 }
+
+init_log() {
+    ${top_srcdir}/tools/initlog.py --config ${top_srcdir}/test/catlfish-test.cfg --localconfig ${top_srcdir}/test/catlfish-test-local-merge.cfg || fail "Log init failed"
+}