diff --git a/Jenkinsfile b/Jenkinsfile
index e7603b578b..68fe4879c1 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -42,15 +42,15 @@ def pre_test(){
     cd ${WKC}
     git checkout develop
     git reset --hard HEAD~10 >/dev/null 
-    git pull
+    git pull >/dev/null
     git fetch origin +refs/pull/${CHANGE_ID}/merge
     git checkout -qf FETCH_HEAD
-    git --no-pager diff --name-only FETCH_HEAD $(git merge-base FETCH_HEAD develop)|grep -v -E '.*md|//src//connector|Jenkinsfile' || exit 0
+    git --no-pager diff --name-only FETCH_HEAD $(git merge-base FETCH_HEAD develop)|grep -v -E '.*md|//src//connector|Jenkinsfile'
     find ${WKC}/tests/pytest -name \'*\'.sql -exec rm -rf {} \\;
     cd ${WK}
     git reset --hard HEAD~10
-    git checkout develop
-    git pull
+    git checkout develop 
+    git pull >/dev/null 
     cd ${WK}
     export TZ=Asia/Harbin
     date
diff --git a/tests/test-all.sh b/tests/test-all.sh
index db9d6523a0..bda03191d1 100755
--- a/tests/test-all.sh
+++ b/tests/test-all.sh
@@ -24,11 +24,16 @@ function stopTaosd {
 
 function dohavecore(){
   corefile=`find $corepath -mmin 1`  
+  core_file=`echo $corefile|cut -d " " -f2`
+  echo $core_file
+  proc=`echo $corefile|cut -d "_" -f3`
   if [ -n "$corefile" ];then
-  echo 'taosd or taos has generated core'
-  if [[ $1 == 1 ]];then
-    exit 8
-  fi
+    echo 'taosd or taos has generated core'
+    tar -zcvPf $corepath'taos_'`date "+%Y_%m_%d_%H_%M_%S"`.tar.gz /usr/local/taos/
+    if [[ $1 == 1 ]];then
+      echo '\n'|gdb /usr/local/taos/bin/$proc $core_file -ex "bt 10" -ex quit
+      exit 8
+    fi
   fi
 }
 function runSimCaseOneByOne {