[kylin] 06/14: KYLIN-4290 Add file lock to kylin startup script to avoid starting multiple instances on one node

[ni...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

nic pushed a commit to branch 2.6.x
in repository https://gitbox.apache.org/repos/asf/kylin.git

commit 6d7cf0220a6dd24ea5661a973c475f6e552fbba9
Author: yangzheng10 <ya...@58.com>
AuthorDate: Tue Dec 10 19:10:51 2019 +0800

    KYLIN-4290 Add file lock to kylin startup script to avoid starting multiple instances on one node
---
 build/bin/kylin.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/build/bin/kylin.sh b/build/bin/kylin.sh
index d6a311e..00e545a 100755
--- a/build/bin/kylin.sh
+++ b/build/bin/kylin.sh
@@ -66,6 +66,14 @@ function retrieveStartCommand() {
         fi
     fi
 
+    lockfile=$KYLIN_HOME/LOCK
+    if [ ! -e $lockfile ]; then
+        trap "rm -f $lockfile; exit" INT TERM EXIT
+        touch $lockfile
+    else
+        quit "Kylin is starting, wait for it"
+    fi
+
     source ${dir}/check-env.sh
 
     tomcat_root=${dir}/../tomcat
@@ -130,6 +138,7 @@ if [ "$1" == "start" ]
 then
     retrieveStartCommand
     ${start_command} >> ${KYLIN_HOME}/logs/kylin.out 2>&1 & echo $! > ${KYLIN_HOME}/pid &
+    rm -f $lockfile
 
     echo ""
     echo "A new Kylin instance is started by $USER. To stop it, run 'kylin.sh stop'"
@@ -142,6 +151,7 @@ elif [ "$1" == "run" ]
 then
     retrieveStartCommand
     ${start_command}
+    rm -f $lockfile
 
 # stop command
 elif [ "$1" == "stop" ]