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Posted to dev@edgent.apache.org by vdogaru <gi...@git.apache.org> on 2016/04/07 22:58:35 UTC
[GitHub] incubator-quarks pull request: [WIP] QUARKS-13: Start over Quarks ...
GitHub user vdogaru opened a pull request:
https://github.com/apache/incubator-quarks/pull/79
[WIP] QUARKS-13: Start over Quarks when the JVM crashes (Linux)
Simple mechanism to restart a Quarks application if the JVM running Quarks terminates unexpectedly:
- Sample application which simulates a JVM crash after processing N tuples
- Script which checks whether the Quarks JVM is still running, otherwise it restarts the Quarks sample app
- Cron entry which runs the script every mnute
- Readme providing setup instructions
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vdogaru/incubator-quarks QUARKS-13-vdogaru
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-quarks/pull/79.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #79
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commit 6615560b8b297f7bd07d4db7734e60a5774cef83
Author: Victor Dogaru <vd...@apache.org>
Date: 2016-04-07T20:08:24Z
QUARKS-13-vdogaru Sample app which terminates the JVM after N tuples
commit bfd1273a22d9e868f01a5dc3587daf53d95f42db
Author: Victor Dogaru <vd...@apache.org>
Date: 2016-04-07T20:09:50Z
QUARKS-13-vdogaru Script and crontab entry for Quarks jvm monitoring
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[GitHub] incubator-quarks pull request: QUARKS-13: Start over Quarks when t...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/incubator-quarks/pull/79
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[GitHub] incubator-quarks pull request: [WIP] QUARKS-13: Start over Quarks ...
Posted by ddebrunner <gi...@git.apache.org>.
Github user ddebrunner commented on a diff in the pull request:
https://github.com/apache/incubator-quarks/pull/79#discussion_r59043626
--- Diff: scripts/cron/startapp.cron ---
@@ -0,0 +1,27 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Crontab file which contains settings for scheduling the execution of a
+# monitoring script every minute using cron.
+#
+# You must set the QUARKS environment variable to point to your Quarks
+# installation:
+# QUARKS=/home/your_userid/quarks/java8
+#
+# Make sure that java is in the PATH environment used by cron:
+# PATH=/opt/my_java/bin:$PATH
--- End diff --
Why not use the standard approach of JAVA_HOME?
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[GitHub] incubator-quarks pull request: [WIP] QUARKS-13: Start over Quarks ...
Posted by ddebrunner <gi...@git.apache.org>.
Github user ddebrunner commented on a diff in the pull request:
https://github.com/apache/incubator-quarks/pull/79#discussion_r59043494
--- Diff: scripts/cron/startapp.cron ---
@@ -0,0 +1,27 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Crontab file which contains settings for scheduling the execution of a
+# monitoring script every minute using cron.
+#
+# You must set the QUARKS environment variable to point to your Quarks
--- End diff --
Wouldn't be easier to have the quarks location passed in as a command line argument rather than requiring an evironment variable set elsewhere?
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[GitHub] incubator-quarks pull request: [WIP] QUARKS-13: Start over Quarks ...
Posted by ddebrunner <gi...@git.apache.org>.
Github user ddebrunner commented on a diff in the pull request:
https://github.com/apache/incubator-quarks/pull/79#discussion_r59044276
--- Diff: scripts/cron/startapp.sh ---
@@ -0,0 +1,119 @@
+#!/bin/bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+[ ! -n "${QUARKS:-}" ] && QUARKS=../..
+
+#
+# Application name identifies the running process. For the scope of this
--- End diff --
Seems like with minor changes this could change from a sample to a reusable script, e.g. passing in the classpath and main class name.
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