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The following commit(s) were added to refs/heads/master by this push:
     new 53bc87b  BIGTOP-3142. Better user expereince when calling 
docker-hadoop.sh -d with no cluster running (#500)
53bc87b is described below

commit 53bc87bbdbc06abdc1413dcf973d126dcc415ad0
Author: Evans Ye <[email protected]>
AuthorDate: Mon Mar 18 23:53:48 2019 +0800

    BIGTOP-3142. Better user expereince when calling docker-hadoop.sh -d with 
no cluster running (#500)
---
 provisioner/docker/docker-hadoop.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/provisioner/docker/docker-hadoop.sh 
b/provisioner/docker/docker-hadoop.sh
index bf8b53d..ab262cd 100755
--- a/provisioner/docker/docker-hadoop.sh
+++ b/provisioner/docker/docker-hadoop.sh
@@ -161,6 +161,10 @@ smoke-tests() {
 }
 
 destroy() {
+    if [ -z ${PROVISION_ID+x} ]; then
+        echo "No cluster exists!"
+        exit 1
+    fi
     docker exec ${NODES[0]} bash -c "umount /etc/hosts; rm -f /etc/hosts"
     if [ -n "$PROVISION_ID" ]; then
         docker-compose -p $PROVISION_ID stop

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