Cron tab to run a java file
0
I'm having issues getting a cron tab to run a java file every 5 minutes.
I have tried to create an executable script to see if that is what's needed:
My script and java file are both stored in /usr/local/bin and this is what I have in my crontab:
*/5 * * * * /usr/local/bin/java-crontab.sh
This is what I have in my script
#!/bin/bash
JAVA_HOME=usr/java/jdk1.6.0_40
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
java -jar /usr/local/bin/javatest.jar
scripting cron java
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
bumped to the homepage by Community♦ 11 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
0
I'm having issues getting a cron tab to run a java file every 5 minutes.
I have tried to create an executable script to see if that is what's needed:
My script and java file are both stored in /usr/local/bin and this is what I have in my crontab:
*/5 * * * * /usr/local/bin/java-crontab.sh
This is what I have in my script
#!/bin/bash
JAVA_HOME=usr/java/jdk1.6.0_40
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
java -jar /usr/local/bin/javatest.jar
scripting cron java
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
bumped to the homepage by Community♦ 11 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Welcome to Unix Stackexchange! You can take the tour first and the learn How to Ask a good question. That makes it easier for us to help you.
– andcoz
Feb 6 '17 at 13:40
@hannah-s check the mailbox of the user that owns the crontab for error log emails,
– andcoz
Feb 6 '17 at 13:43
Do you think you have to define JAVA_HOME each time you run a java app? You don't have to. Just use the absolute path to java: /usr/share/doc/openjdk-6-jre-headless/java -jar ...
– ka3ak
Feb 6 '17 at 16:06
Ahhh i didn't know - it still isn't working I'm afraid unless i still have a typo, iv changed the script file to: #!/bin/bash export PATH=/usr/share/doc/openjdk-6-jre-headless:$PATH java -jar /usr/local/bin/javatest.jar but it isn't running :(
– Hannah.S
Feb 6 '17 at 16:25
add a comment |
0
0
0
I'm having issues getting a cron tab to run a java file every 5 minutes.
I have tried to create an executable script to see if that is what's needed:
My script and java file are both stored in /usr/local/bin and this is what I have in my crontab:
*/5 * * * * /usr/local/bin/java-crontab.sh
This is what I have in my script
#!/bin/bash
JAVA_HOME=usr/java/jdk1.6.0_40
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
java -jar /usr/local/bin/javatest.jar
scripting cron java
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
I'm having issues getting a cron tab to run a java file every 5 minutes.
I have tried to create an executable script to see if that is what's needed:
My script and java file are both stored in /usr/local/bin and this is what I have in my crontab:
*/5 * * * * /usr/local/bin/java-crontab.sh
This is what I have in my script
#!/bin/bash
JAVA_HOME=usr/java/jdk1.6.0_40
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
java -jar /usr/local/bin/javatest.jar
scripting cron java
scripting cron java
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
edited Nov 18 '18 at 6:28
Rui F Ribeiro
40.7k1479137
40.7k1479137
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
asked Feb 6 '17 at 13:31
Hannah.SHannah.S
11
11
bumped to the homepage by Community♦ 11 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 11 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Welcome to Unix Stackexchange! You can take the tour first and the learn How to Ask a good question. That makes it easier for us to help you.
– andcoz
Feb 6 '17 at 13:40
@hannah-s check the mailbox of the user that owns the crontab for error log emails,
– andcoz
Feb 6 '17 at 13:43
Do you think you have to define JAVA_HOME each time you run a java app? You don't have to. Just use the absolute path to java: /usr/share/doc/openjdk-6-jre-headless/java -jar ...
– ka3ak
Feb 6 '17 at 16:06
Ahhh i didn't know - it still isn't working I'm afraid unless i still have a typo, iv changed the script file to: #!/bin/bash export PATH=/usr/share/doc/openjdk-6-jre-headless:$PATH java -jar /usr/local/bin/javatest.jar but it isn't running :(
– Hannah.S
Feb 6 '17 at 16:25
add a comment |
Welcome to Unix Stackexchange! You can take the tour first and the learn How to Ask a good question. That makes it easier for us to help you.
– andcoz
Feb 6 '17 at 13:40
@hannah-s check the mailbox of the user that owns the crontab for error log emails,
– andcoz
Feb 6 '17 at 13:43
Do you think you have to define JAVA_HOME each time you run a java app? You don't have to. Just use the absolute path to java: /usr/share/doc/openjdk-6-jre-headless/java -jar ...
– ka3ak
Feb 6 '17 at 16:06
Ahhh i didn't know - it still isn't working I'm afraid unless i still have a typo, iv changed the script file to: #!/bin/bash export PATH=/usr/share/doc/openjdk-6-jre-headless:$PATH java -jar /usr/local/bin/javatest.jar but it isn't running :(
– Hannah.S
Feb 6 '17 at 16:25
Welcome to Unix Stackexchange! You can take the tour first and the learn How to Ask a good question. That makes it easier for us to help you.
– andcoz
Feb 6 '17 at 13:40
Welcome to Unix Stackexchange! You can take the tour first and the learn How to Ask a good question. That makes it easier for us to help you.
– andcoz
Feb 6 '17 at 13:40
@hannah-s check the mailbox of the user that owns the crontab for error log emails,
– andcoz
Feb 6 '17 at 13:43
@hannah-s check the mailbox of the user that owns the crontab for error log emails,
– andcoz
Feb 6 '17 at 13:43
Do you think you have to define JAVA_HOME each time you run a java app? You don't have to. Just use the absolute path to java: /usr/share/doc/openjdk-6-jre-headless/java -jar ...
– ka3ak
Feb 6 '17 at 16:06
Do you think you have to define JAVA_HOME each time you run a java app? You don't have to. Just use the absolute path to java: /usr/share/doc/openjdk-6-jre-headless/java -jar ...
– ka3ak
Feb 6 '17 at 16:06
Ahhh i didn't know - it still isn't working I'm afraid unless i still have a typo, iv changed the script file to: #!/bin/bash export PATH=/usr/share/doc/openjdk-6-jre-headless:$PATH java -jar /usr/local/bin/javatest.jar but it isn't running :(
– Hannah.S
Feb 6 '17 at 16:25
Ahhh i didn't know - it still isn't working I'm afraid unless i still have a typo, iv changed the script file to: #!/bin/bash export PATH=/usr/share/doc/openjdk-6-jre-headless:$PATH java -jar /usr/local/bin/javatest.jar but it isn't running :(
– Hannah.S
Feb 6 '17 at 16:25
add a comment |
2 Answers
2
active
oldest
votes
0
your java-crontab.sh has a typo. JAVA_HOME should be an absolute path.
Simplifying, you could go with
#!/bin/sh
export PATH=/usr/java/jdk1.6.0_40:$PATH
java -jar /usr/local/bin/javatest.jar
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
In theory. Don't forget to replace/usr/java/jdk1.6.0_40with/usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...
– SYN
Feb 7 '17 at 5:51
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
|
show 1 more comment
0
Sorry update - my JAVA_HOME file is not stored in usr/java but in usr/share/doc/openjdk-6-jre-headless. However when I enter that path in the executable script file I don't have permission to do so.
Brand new to creating VM's so apologies for my utter confusion here!
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
add a comment |
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2 Answers
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oldest
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2 Answers
2
active
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active
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oldest
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0
your java-crontab.sh has a typo. JAVA_HOME should be an absolute path.
Simplifying, you could go with
#!/bin/sh
export PATH=/usr/java/jdk1.6.0_40:$PATH
java -jar /usr/local/bin/javatest.jar
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
In theory. Don't forget to replace/usr/java/jdk1.6.0_40with/usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...
– SYN
Feb 7 '17 at 5:51
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
|
show 1 more comment
0
your java-crontab.sh has a typo. JAVA_HOME should be an absolute path.
Simplifying, you could go with
#!/bin/sh
export PATH=/usr/java/jdk1.6.0_40:$PATH
java -jar /usr/local/bin/javatest.jar
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
In theory. Don't forget to replace/usr/java/jdk1.6.0_40with/usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...
– SYN
Feb 7 '17 at 5:51
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
|
show 1 more comment
0
0
0
your java-crontab.sh has a typo. JAVA_HOME should be an absolute path.
Simplifying, you could go with
#!/bin/sh
export PATH=/usr/java/jdk1.6.0_40:$PATH
java -jar /usr/local/bin/javatest.jar
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
your java-crontab.sh has a typo. JAVA_HOME should be an absolute path.
Simplifying, you could go with
#!/bin/sh
export PATH=/usr/java/jdk1.6.0_40:$PATH
java -jar /usr/local/bin/javatest.jar
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
answered Feb 6 '17 at 13:50
SYNSYN
1,899515
1,899515
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
In theory. Don't forget to replace/usr/java/jdk1.6.0_40with/usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...
– SYN
Feb 7 '17 at 5:51
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
|
show 1 more comment
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
In theory. Don't forget to replace/usr/java/jdk1.6.0_40with/usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...
– SYN
Feb 7 '17 at 5:51
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
I've just realised that JAVA_HOME is set in /usr/lib/jvm/java-6-sun. If I give rwx permissions and place that in my script should that theoretically work?
– Hannah.S
Feb 6 '17 at 14:10
In theory. Don't forget to replace
/usr/java/jdk1.6.0_40 with /usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...– SYN
Feb 7 '17 at 5:51
In theory. Don't forget to replace
/usr/java/jdk1.6.0_40 with /usr/lib/jvm/java-6-sun. Try running the script manually before configuring your crontab. If it fails, tell us what's going on, ...– SYN
Feb 7 '17 at 5:51
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
Hello, so I ran the script using the bash command and I got an error saying 'exception in thread "main" java.lang.reflect.inovocationtargetexception etc etc
– Hannah.S
Feb 7 '17 at 17:56
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
without the full trace and some visual on your sources, there's no way of telling what happened. Regardless, my first guess would be you're running an old version of Java: are you sure this jar is supposed to work with 1.6?
– SYN
Feb 7 '17 at 18:08
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
The sys log file just says 'NO MTA installed, discarding output' I did install postfix but the crontab still was not running the jar file so I returned to my earlier snapshot which was before I installed postfix. I also created a new logfile in hope the crontab would report the errors into that but the logfile remained blank
– Hannah.S
Feb 8 '17 at 17:31
|
show 1 more comment
0
Sorry update - my JAVA_HOME file is not stored in usr/java but in usr/share/doc/openjdk-6-jre-headless. However when I enter that path in the executable script file I don't have permission to do so.
Brand new to creating VM's so apologies for my utter confusion here!
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
add a comment |
0
Sorry update - my JAVA_HOME file is not stored in usr/java but in usr/share/doc/openjdk-6-jre-headless. However when I enter that path in the executable script file I don't have permission to do so.
Brand new to creating VM's so apologies for my utter confusion here!
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
add a comment |
0
0
0
Sorry update - my JAVA_HOME file is not stored in usr/java but in usr/share/doc/openjdk-6-jre-headless. However when I enter that path in the executable script file I don't have permission to do so.
Brand new to creating VM's so apologies for my utter confusion here!
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
Sorry update - my JAVA_HOME file is not stored in usr/java but in usr/share/doc/openjdk-6-jre-headless. However when I enter that path in the executable script file I don't have permission to do so.
Brand new to creating VM's so apologies for my utter confusion here!
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
answered Feb 6 '17 at 14:14
Hannah.SHannah.S
11
11
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
add a comment |
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
Since you're new here: you should edit your initial post, instead of proposing answers correcting your question.
– SYN
Feb 7 '17 at 5:48
add a comment |
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Welcome to Unix Stackexchange! You can take the tour first and the learn How to Ask a good question. That makes it easier for us to help you.
– andcoz
Feb 6 '17 at 13:40
@hannah-s check the mailbox of the user that owns the crontab for error log emails,
– andcoz
Feb 6 '17 at 13:43
Do you think you have to define JAVA_HOME each time you run a java app? You don't have to. Just use the absolute path to java: /usr/share/doc/openjdk-6-jre-headless/java -jar ...
– ka3ak
Feb 6 '17 at 16:06
Ahhh i didn't know - it still isn't working I'm afraid unless i still have a typo, iv changed the script file to: #!/bin/bash export PATH=/usr/share/doc/openjdk-6-jre-headless:$PATH java -jar /usr/local/bin/javatest.jar but it isn't running :(
– Hannah.S
Feb 6 '17 at 16:25