Java Cron 和史诗失败

Question

im 运行这个在 14.04.1-Ubuntu

Linux matlabrun 3.19.0-56-generic #62~14.04.1-Ubuntu SMP Fri Mar 11 11:03:15 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

使用 java 版本：

java version "1.7.0_80" Java(TM) SE Runtime Environment (build 1.7.0_80-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)

所以我的 cron 中有两个元素 testrun 和 delme.jar.

PATH=/usr/bin/java:/usr/bin/javac:/usr/lib/jvm/java-7-oracle/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
    LD_LIBRARY_PATH=/usr/local/MATLAB/MATLAB_Runtime/v85/runtime/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v85/bin/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v85/sys/os/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v90/$
    XAPPLRESDIR=/usr/local/MATLAB/MATLAB_Runtime/v85/X11/app-defaults:/usr/local/MATLAB/MATLAB_Runtime/v90/X11/app-defaults
    # Edit this file to introduce tasks to be run by cron.
    #
    # Each task to run has to be defined through a single line
    # indicating with different fields when the task will be run
    # and what command to run for the task
    #
    # To define the time you can provide concrete values for
    # minute (m), hour (h), day of month (dom), month (mon),
    # and day of week (dow) or use '*' in these fields (for 'any').#
    # Notice that tasks will be started based on the cron's system
    # daemon's notion of time and timezones.
    #
    # Output of the crontab jobs (including errors) is sent through
    # email to the user the crontab file belongs to (unless redirected).
    #
    # For example, you can run a backup of all your user accounts
    # at 5 a.m every week with:
    # 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
    #
    # For more information see the manual pages of crontab(5) and cron(8)
    #
    # m h  dom mon dow   command
    5,10,15,20,30,35,40,43,45,50,52,55,58 * * * 0,1,2,3,4,5,6 /home/meh/model/TestModelABC/testrun > /home/meh/model/TestModelABC/testrun.log
    5,10,13,15,17,18,20,25,30,33,35,36,40,43,45,50,52,55,58 * * * 0,1,2,3,4,5,6 java -jar /home/meh/model/TestModelABC/delme.jar > /home/meh/model/TestModelABC/del.log

testrun 是一个 bash 脚本，它调用 java 代码如下：

#!/bin/sh
java -jar delme.jar

这行不通。当我从 crontab 中直接通过 java -jar delme.jar 调用文件时，它也不起作用。

我知道 cron 运行它只是不执行 java。

为此，如您所见，我已将路径放入 crontab，并尝试将路径放入 bash 脚本中，如下所示：

PATH=/usr/bin/java:/usr/bin/javac:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
LD_LIBRARY_PATH=/usr/local/MATLAB/MATLAB_Runtime/v85/runtime/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v85/bin/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v85/sys/os/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v90/runtime/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v90/bin/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/v90/sys/os/glnxa64:
XAPPLRESDIR=/usr/local/MATLAB/MATLAB_Runtime/v85/X11/app-defaults:/usr/local/MATLAB/MATLAB_Runtime/v90/X11/app-defaults
echo "Forecast Test"

我现在真的被困住了，因为我没有办法尝试。有任何想法吗？我的直觉告诉我这是一个 PATH 问题，但我不知道还可以尝试什么。

Answer 1

It also doesn't work when i call the file directly via the java -jar delme.jar

听起来您没有可执行的 jar 文件。

确保您在 jar 清单中设置了 Main-Class: classname，或者直接运行 class，在 class 路径上指定您的 jar。

例如java -cp delme.jar path.to.package.Main

另请参阅：How to make an executable jar file?

Answer 2

事实证明这是一个路径问题，CRON 从 /home/user 调用，因此 -cp 中使用的任何相对路径不再有效。

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