[jira] [Reopened] (DAEMON-65) [daemon] runs as multiple instances, does not use PID file logic
[ https://issues.apache.org/jira/browse/DAEMON-65?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Mark Thomas reopened DAEMON-65: --- > [daemon] runs as multiple instances, does not use PID file logic > > > Key: DAEMON-65 > URL: https://issues.apache.org/jira/browse/DAEMON-65 > Project: Commons Daemon > Issue Type: Bug >Affects Versions: 1.0 > Environment: Operating System: Linux > Platform: PC >Reporter: bernard >Priority: Critical > > jsvc writes its own pid file but it appears that it does not have a logic that > secures its own integrity. > Multiple duplicate processes can be created simply by issuing the same jsvc > command multiple times. The created processes cannot be killed using the pppid > file for obvious reasons. > 1) jsvc should terminate prematurely if it finds its own pid file. > 2) jsvc should delete its own pid file when killed. > If 1) and 2) are not acceptable because (hypothetically, because I don't know > the specifications) the specifications require that the caller incorporates > this > logic, then jsvc should not write a pid file. > Why do i think so? > Depending on implementation, the risk of malfunctioning is much higher if the > pid file is managed across different execution environments. > One major reason is that these environments are not usually maintained by the > same person. > I guess one might try to get a file system lock on the pid file before > launching > the java program. > Please excuse my ignorance if I am misinterpreting the daemon functionality in > any way. I have tried to get responses from 3 relevant mailing lists, > commons-user, commons-dev and tomcat-user, but nobody replied. > I am not a Linux programmer and I would not be surprised if this kind of > programming problem (uniqueness of id'd processes on one machine) has a > standard > solution under Linux. > Because -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] Reopened: (DAEMON-65) [daemon] runs as multiple instances, does not use PID file logic
[ https://issues.apache.org/jira/browse/DAEMON-65?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Dennis Lundberg reopened DAEMON-65: --- > [daemon] runs as multiple instances, does not use PID file logic > > > Key: DAEMON-65 > URL: https://issues.apache.org/jira/browse/DAEMON-65 > Project: Commons Daemon > Issue Type: Bug >Affects Versions: 1.0 > Environment: Operating System: Linux > Platform: PC >Reporter: bernard >Priority: Critical > > jsvc writes its own pid file but it appears that it does not have a logic that > secures its own integrity. > Multiple duplicate processes can be created simply by issuing the same jsvc > command multiple times. The created processes cannot be killed using the pppid > file for obvious reasons. > 1) jsvc should terminate prematurely if it finds its own pid file. > 2) jsvc should delete its own pid file when killed. > If 1) and 2) are not acceptable because (hypothetically, because I don't know > the specifications) the specifications require that the caller incorporates > this > logic, then jsvc should not write a pid file. > Why do i think so? > Depending on implementation, the risk of malfunctioning is much higher if the > pid file is managed across different execution environments. > One major reason is that these environments are not usually maintained by the > same person. > I guess one might try to get a file system lock on the pid file before > launching > the java program. > Please excuse my ignorance if I am misinterpreting the daemon functionality in > any way. I have tried to get responses from 3 relevant mailing lists, > commons-user, commons-dev and tomcat-user, but nobody replied. > I am not a Linux programmer and I would not be surprised if this kind of > programming problem (uniqueness of id'd processes on one machine) has a > standard > solution under Linux. > Because -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
