SCRIPTS: run-regtests: Increase internal buffer size used for logs

It was set to 2MB. But the script testing the Prometheus exporter is quite
verbose and may exceed this limit, leading to the following error:

  *    diag  0.0 Assert error in vtc_log_emit(), src/vtc_log.c line 179:
  *    diag  0.0   Condition(vtclog_left > l) not true. (errno=0 Success)

To avoid any issue for a while, the limit is now set to 4MB.

This patch should fix the issue #3494.

diff --git a/scripts/run-regtests.sh b/scripts/run-regtests.sh
index d5bc13918cb25562e76ad25f781f28b7a47669b2..d864ab198f8ddda58c41f52f1fc26dcb2288cddf 100755 (executable)
--- a/scripts/run-regtests.sh
+++ b/scripts/run-regtests.sh
@@ -272,7 +272,7 @@ if [ -n "$testlist" ]; then
   if [ -n "$jobcount" ]; then
     jobcount="-j $jobcount"
   fi
-  cmd="$VTEST_PROGRAM -b $((2<<20)) -k -t ${VTEST_TIMEOUT} -L $verbose $debug $jobcount $vtestparams $testlist"
+  cmd="$VTEST_PROGRAM -b $((4<<20)) -k -t ${VTEST_TIMEOUT} -L $verbose $debug $jobcount $vtestparams $testlist"
   eval $cmd
   _vtresult=$?
   grep -rE --include="LOG" 'sh: -c: line [0-9]+: syntax error|syntax error near unexpected token|Syntax error' "$TESTDIR"