andrewmchorney
asked on
Unix kill command and the java virtual machine
I need to know what happens when a unix kill command is executed for a java program. Does the java virtual machine terminate the java program that is running, allowing for a graceful shutdown or does the kill command kill the java program instantaneously.
I need this information in order to design some code changes.
I need this information in order to design some code changes.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
It would depend on which signal was used with kill, if it was SIGTERM (the default) then you have a chance. The application can register a handler to be called on recieving the signal. If kill was executed with -9 then Im afraid nothing can be done (HUP cant be caught).
This leaves you with the problem of recieving signals, this is where the library mentioned earlier comes in useful.
If you have not doent anything to catch signals then your Java program will just stop executing without any further ado.
Not that most of the signals available do not cause termination of the program, kill is probably a poor choice of name, the default just happens to do that. Try running kill -l (thats l as in list).
Regards,
Vic
This leaves you with the problem of recieving signals, this is where the library mentioned earlier comes in useful.
If you have not doent anything to catch signals then your Java program will just stop executing without any further ado.
Not that most of the signals available do not cause termination of the program, kill is probably a poor choice of name, the default just happens to do that. Try running kill -l (thats l as in list).
Regards,
Vic
ADMINISTRATION WILL BE CONTACTING YOU SHORTLY. Moderators Computer101 or Netminder will return to finalize these if still open in seven days. Please post closing recommendations before that time.
Question(s) below appears to have been abandoned. Your options are:
1. Accept a Comment As Answer (use the button next to the Expert's name).
2. Close the question if the information was not useful to you. You must tell the participants why you wish to do this, and allow for Expert response.
3. Ask Community Support to help split points between participating experts, or just comment here with details and we'll respond with the process.
4. Delete the question. Again, please comment to advise the other participants why you wish to do this.
For special handling needs, please post a zero point question in the link below and include the question QID/link(s) that it regards.
https://www.experts-exchange.com/jsp/qList.jsp?ta=commspt
Please click the Help Desk link on the left for Member Guidelines, Member Agreement and the Question/Answer process. https://www.experts-exchange.com/jsp/cmtyHelpDesk.jsp
Please click you Member Profile to view your question history and keep them all current with updates as the collaboration effort continues, to track all your open and locked questions at this site. If you are an EE Pro user, use the Power Search option to find them. Anytime you have questions which are LOCKED with a Proposed Answer but does not serve your needs, please reject it and add comments as to why. In addition, when you do grade the question, if the grade is less than an A, please add a comment as to why. This helps all involved, as well as future persons who may access this item in the future to seek help.
To view your open questions, please click the following link(s) and keep them all current with updates.
https://www.experts-exchange.com/questions/Q.11438258.html
https://www.experts-exchange.com/questions/Q.20136425.html
https://www.experts-exchange.com/questions/Q.20140929.html
https://www.experts-exchange.com/questions/Q.20230446.html
https://www.experts-exchange.com/questions/Q.20252892.html
https://www.experts-exchange.com/questions/Q.20252904.html
To view your locked questions, please click the following link(s) and evaluate the proposed answer.
https://www.experts-exchange.com/questions/Q.20127150.html
https://www.experts-exchange.com/questions/Q.20141198.html
PLEASE DO NOT AWARD THE POINTS TO ME.
------------> EXPERTS: Please leave any comments regarding your closing recommendations if this item remains inactive another seven (7) days. Also, if you are interested in the cleanup effort, please click this link https://www.experts-exchange.com/jsp/qManageQuestion.jsp?ta=commspt&qid=20274643
Moderators will finalize this question if still open in 7 days, by either moving this to the PAQ (Previously Asked Questions) at zero points, deleting it or awarding expert(s) when recommendations are made, or an independent determination can be made. Expert input is always appreciated to determine the fair outcome.
Thank you everyone.
Moondancer
Moderator @ Experts Exchange
P.S. For any year 2000 questions, special attention is needed to ensure the first correct response is awarded, since they are not in the comment date order, but rather in Member ID order.
Question(s) below appears to have been abandoned. Your options are:
1. Accept a Comment As Answer (use the button next to the Expert's name).
2. Close the question if the information was not useful to you. You must tell the participants why you wish to do this, and allow for Expert response.
3. Ask Community Support to help split points between participating experts, or just comment here with details and we'll respond with the process.
4. Delete the question. Again, please comment to advise the other participants why you wish to do this.
For special handling needs, please post a zero point question in the link below and include the question QID/link(s) that it regards.
https://www.experts-exchange.com/jsp/qList.jsp?ta=commspt
Please click the Help Desk link on the left for Member Guidelines, Member Agreement and the Question/Answer process. https://www.experts-exchange.com/jsp/cmtyHelpDesk.jsp
Please click you Member Profile to view your question history and keep them all current with updates as the collaboration effort continues, to track all your open and locked questions at this site. If you are an EE Pro user, use the Power Search option to find them. Anytime you have questions which are LOCKED with a Proposed Answer but does not serve your needs, please reject it and add comments as to why. In addition, when you do grade the question, if the grade is less than an A, please add a comment as to why. This helps all involved, as well as future persons who may access this item in the future to seek help.
To view your open questions, please click the following link(s) and keep them all current with updates.
https://www.experts-exchange.com/questions/Q.11438258.html
https://www.experts-exchange.com/questions/Q.20136425.html
https://www.experts-exchange.com/questions/Q.20140929.html
https://www.experts-exchange.com/questions/Q.20230446.html
https://www.experts-exchange.com/questions/Q.20252892.html
https://www.experts-exchange.com/questions/Q.20252904.html
To view your locked questions, please click the following link(s) and evaluate the proposed answer.
https://www.experts-exchange.com/questions/Q.20127150.html
https://www.experts-exchange.com/questions/Q.20141198.html
PLEASE DO NOT AWARD THE POINTS TO ME.
------------> EXPERTS: Please leave any comments regarding your closing recommendations if this item remains inactive another seven (7) days. Also, if you are interested in the cleanup effort, please click this link https://www.experts-exchange.com/jsp/qManageQuestion.jsp?ta=commspt&qid=20274643
Moderators will finalize this question if still open in 7 days, by either moving this to the PAQ (Previously Asked Questions) at zero points, deleting it or awarding expert(s) when recommendations are made, or an independent determination can be made. Expert input is always appreciated to determine the fair outcome.
Thank you everyone.
Moondancer
Moderator @ Experts Exchange
P.S. For any year 2000 questions, special attention is needed to ensure the first correct response is awarded, since they are not in the comment date order, but rather in Member ID order.
Force-accepted by
Netminder
CS Moderator
Netminder
CS Moderator
ASKER