date:20141111

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Bernd Eckenfels

Am Tue, 11 Nov 2014 00:09:57 -0500
schrieb Anil Ambati :
> Why does the Tomcat server keep the PID file locked, preventing other 
> processes to even read the file? Is there a work around or solution
> for this problem?

I think the reason for that is, that you can this way detect if the
process is still running: if it is locked, then it is running.

Of course this makes it hard to read the file. To work around this I
guess a native library is needed. (Or you execute "cmd /C type
file.pid"). Not sure if any component offers this (might be a good
addition to commons-daemon).

Gruss
Bernd

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[daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Anil Ambati

I was asked to post this question in this forum.

We have a requirement to read the PID file created by the Tomcat server 
process on Windows, but we are not able to using RandomAccessFile or 
FileInputStream because the file seems to be
locked by the Tomcat process. 

Why does the Tomcat server keep the PID file locked, preventing other 
processes to even read the file? Is there a work around or solution for 
this problem?


Christopher Schultz wrote this in Tomcat user forum:

I took a quick look, and it looks like the PID file is being created
with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
delete the file off the disk when all file handles are closed. So,
closing the file handle will result in the PID file being deleted.

This option was added because the PID file wasn't being removed if the
service crashed, which kept the service from restarting (oops).

https://issues.apache.org/jira/browse/DAEMON-183

It seems like an option to control what happens on startup when the
PID file already exists would be a good idea. You'll have to ask the
procrun folks about what the options are. It seems reasonable to be
able to read the PID file, since not being able to read it makes it
kind of useless other than as a lock-file (i.e. its contents are
irrelevant).

Regards,



Anilkumar Ambati
 4205 S Miami Blvd

WebSphere Virtual Enterprise Development
 Durham, 27703-9141
Phone:
+1-919-254-6152
 USA
Mobile:
+1-919-434-5674
 

e-mail:
aamb...@us.ibm.com
 

"You have no responsibility to live up to what other people think you 
ought to accomplish." -Richard Feynman (1918-1988)

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Mark Thomas

On 11/11/2014 16:47, Gary Gregory wrote:
> Sorry, I meant what version of Commons Daemon.

It is the latest release. 1.0.15.

Mark

> 
> Gary
> 
> On Tue, Nov 11, 2014 at 11:37 AM, Anil Ambati  wrote:
> 
>> I am using Apache Tomcat 7.0.56. I think that is the latest.
>>
>> Regards,
>>   --
>>   *Anilkumar Ambati*  4205 S Miami Blvd
>>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
>> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail: aamb...@us.ibm.com
>>
>> --
>> "You have no responsibility to live up to what other people think you
>> ought to accomplish." -Richard Feynman (1918-1988)
>>
>>
>>
>>  From: Gary Gregory  To: Commons Users List <
>> user@commons.apache.org>,  Date: 11/11/2014 10:18 AM Subject: Re:
>> [daemon] Unable to read tomcat.pid file created by Tomcat process
>> --
>>
>>
>>
>> So which version of [daemon] are you using? Can you try the latest and
>> greatest. It might not matter but it'll make debugging easier for anyone on
>> this ML.
>>
>> Gary
>>
>> On Tue, Nov 11, 2014 at 10:06 AM, Anil Ambati  wrote:
>>
>>> I was asked to post this question in this forum.
>>>
>>> We have a requirement to read the PID file created by the Tomcat server
>>> process on Windows, but we are not able to using RandomAccessFile or
>>> FileInputStream because the file seems to be
>>> locked by the Tomcat process.
>>>
>>> Why does the Tomcat server keep the PID file locked, preventing other
>>> processes to even read the file? Is there a work around or solution for
>>> this problem?
>>>
>>>
>>> Christopher Schultz wrote this in Tomcat user forum:
>>> 
>>> I took a quick look, and it looks like the PID file is being created
>>> with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
>>> delete the file off the disk when all file handles are closed. So,
>>> closing the file handle will result in the PID file being deleted.
>>>
>>> This option was added because the PID file wasn't being removed if the
>>> service crashed, which kept the service from restarting (oops).
>>>
>>> https://issues.apache.org/jira/browse/DAEMON-183
>>>
>>> It seems like an option to control what happens on startup when the
>>> PID file already exists would be a good idea. You'll have to ask the
>>> procrun folks about what the options are. It seems reasonable to be
>>> able to read the PID file, since not being able to read it makes it
>>> kind of useless other than as a lock-file (i.e. its contents are
>>> irrelevant).
>>>
>>>
>>> Regards,
>>>   --
>>>   *Anilkumar Ambati*  4205 S Miami Blvd
>>>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
>>> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail:
>> aamb...@us.ibm.com
>>>
>>> --
>>> "You have no responsibility to live up to what other people think you
>>> ought to accomplish." -Richard Feynman (1918-1988)
>>>
>>
>>
>>
>> --
>> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
>> Java Persistence with Hibernate, Second Edition
>> 
>> JUnit in Action, Second Edition 
>> Spring Batch in Action 
>> Blog: http://garygregory.wordpress.com
>> Home: http://garygregory.com/
>> Tweet! http://twitter.com/GaryGregory
>>
>>
>>
> 
> 


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Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Gary Gregory

Sorry, I meant what version of Commons Daemon.

Gary

On Tue, Nov 11, 2014 at 11:37 AM, Anil Ambati  wrote:

> I am using Apache Tomcat 7.0.56. I think that is the latest.
>
> Regards,
>   --
>   *Anilkumar Ambati*  4205 S Miami Blvd
>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail: aamb...@us.ibm.com
>
> --
> "You have no responsibility to live up to what other people think you
> ought to accomplish." -Richard Feynman (1918-1988)
>
>
>
>  From: Gary Gregory  To: Commons Users List <
> user@commons.apache.org>,  Date: 11/11/2014 10:18 AM Subject: Re:
> [daemon] Unable to read tomcat.pid file created by Tomcat process
> --
>
>
>
> So which version of [daemon] are you using? Can you try the latest and
> greatest. It might not matter but it'll make debugging easier for anyone on
> this ML.
>
> Gary
>
> On Tue, Nov 11, 2014 at 10:06 AM, Anil Ambati  wrote:
>
> > I was asked to post this question in this forum.
> >
> > We have a requirement to read the PID file created by the Tomcat server
> > process on Windows, but we are not able to using RandomAccessFile or
> > FileInputStream because the file seems to be
> > locked by the Tomcat process.
> >
> > Why does the Tomcat server keep the PID file locked, preventing other
> > processes to even read the file? Is there a work around or solution for
> > this problem?
> >
> >
> > Christopher Schultz wrote this in Tomcat user forum:
> > 
> > I took a quick look, and it looks like the PID file is being created
> > with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
> > delete the file off the disk when all file handles are closed. So,
> > closing the file handle will result in the PID file being deleted.
> >
> > This option was added because the PID file wasn't being removed if the
> > service crashed, which kept the service from restarting (oops).
> >
> > https://issues.apache.org/jira/browse/DAEMON-183
> >
> > It seems like an option to control what happens on startup when the
> > PID file already exists would be a good idea. You'll have to ask the
> > procrun folks about what the options are. It seems reasonable to be
> > able to read the PID file, since not being able to read it makes it
> > kind of useless other than as a lock-file (i.e. its contents are
> > irrelevant).
> >
> >
> > Regards,
> >   --
> >   *Anilkumar Ambati*  4205 S Miami Blvd
> >  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
> > +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail:
> aamb...@us.ibm.com
> >
> > --
> > "You have no responsibility to live up to what other people think you
> > ought to accomplish." -Richard Feynman (1918-1988)
> >
>
>
>
> --
> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
> Java Persistence with Hibernate, Second Edition
> 
> JUnit in Action, Second Edition 
> Spring Batch in Action 
> Blog: http://garygregory.wordpress.com
> Home: http://garygregory.com/
> Tweet! http://twitter.com/GaryGregory
>
>
>


-- 
E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
Java Persistence with Hibernate, Second Edition

JUnit in Action, Second Edition 
Spring Batch in Action 
Blog: http://garygregory.wordpress.com
Home: http://garygregory.com/
Tweet! http://twitter.com/GaryGregory

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Anil Ambati

I am using Apache Tomcat 7.0.56. I think that is the latest.

Regards,



Anilkumar Ambati
 4205 S Miami Blvd

WebSphere Virtual Enterprise Development
 Durham, 27703-9141
Phone:
+1-919-254-6152
 USA
Mobile:
+1-919-434-5674
 

e-mail:
aamb...@us.ibm.com
 

"You have no responsibility to live up to what other people think you 
ought to accomplish." -Richard Feynman (1918-1988)
 
 




From:
Gary Gregory 
To:
Commons Users List , 
Date:
11/11/2014 10:18 AM
Subject:
Re: [daemon] Unable to read tomcat.pid file created by Tomcat process



So which version of [daemon] are you using? Can you try the latest and
greatest. It might not matter but it'll make debugging easier for anyone 
on
this ML.

Gary

On Tue, Nov 11, 2014 at 10:06 AM, Anil Ambati  wrote:

> I was asked to post this question in this forum.
>
> We have a requirement to read the PID file created by the Tomcat server
> process on Windows, but we are not able to using RandomAccessFile or
> FileInputStream because the file seems to be
> locked by the Tomcat process.
>
> Why does the Tomcat server keep the PID file locked, preventing other
> processes to even read the file? Is there a work around or solution for
> this problem?
>
>
> Christopher Schultz wrote this in Tomcat user forum:
> 
> I took a quick look, and it looks like the PID file is being created
> with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
> delete the file off the disk when all file handles are closed. So,
> closing the file handle will result in the PID file being deleted.
>
> This option was added because the PID file wasn't being removed if the
> service crashed, which kept the service from restarting (oops).
>
> https://issues.apache.org/jira/browse/DAEMON-183
>
> It seems like an option to control what happens on startup when the
> PID file already exists would be a good idea. You'll have to ask the
> procrun folks about what the options are. It seems reasonable to be
> able to read the PID file, since not being able to read it makes it
> kind of useless other than as a lock-file (i.e. its contents are
> irrelevant).
>
>
> Regards,
>   --
>   *Anilkumar Ambati*  4205 S Miami Blvd
>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail: 
aamb...@us.ibm.com
>
> --
> "You have no responsibility to live up to what other people think you
> ought to accomplish." -Richard Feynman (1918-1988)
>



-- 
E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
Java Persistence with Hibernate, Second Edition

JUnit in Action, Second Edition 
Spring Batch in Action 
Blog: http://garygregory.wordpress.com
Home: http://garygregory.com/
Tweet! http://twitter.com/GaryGregory

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Gary Gregory

So which version of [daemon] are you using? Can you try the latest and
greatest. It might not matter but it'll make debugging easier for anyone on
this ML.

Gary

On Tue, Nov 11, 2014 at 10:06 AM, Anil Ambati  wrote:

> I was asked to post this question in this forum.
>
> We have a requirement to read the PID file created by the Tomcat server
> process on Windows, but we are not able to using RandomAccessFile or
> FileInputStream because the file seems to be
> locked by the Tomcat process.
>
> Why does the Tomcat server keep the PID file locked, preventing other
> processes to even read the file? Is there a work around or solution for
> this problem?
>
>
> Christopher Schultz wrote this in Tomcat user forum:
> 
> I took a quick look, and it looks like the PID file is being created
> with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
> delete the file off the disk when all file handles are closed. So,
> closing the file handle will result in the PID file being deleted.
>
> This option was added because the PID file wasn't being removed if the
> service crashed, which kept the service from restarting (oops).
>
> https://issues.apache.org/jira/browse/DAEMON-183
>
> It seems like an option to control what happens on startup when the
> PID file already exists would be a good idea. You'll have to ask the
> procrun folks about what the options are. It seems reasonable to be
> able to read the PID file, since not being able to read it makes it
> kind of useless other than as a lock-file (i.e. its contents are
> irrelevant).
>
>
> Regards,
>   --
>   *Anilkumar Ambati*  4205 S Miami Blvd
>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail: aamb...@us.ibm.com
>
> --
> "You have no responsibility to live up to what other people think you
> ought to accomplish." -Richard Feynman (1918-1988)
>



-- 
E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
Java Persistence with Hibernate, Second Edition

JUnit in Action, Second Edition 
Spring Batch in Action 
Blog: http://garygregory.wordpress.com
Home: http://garygregory.com/
Tweet! http://twitter.com/GaryGregory

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Gary Gregory

Wrong list. You probably want
https://tomcat.apache.org/lists.html#tomcat-users

Gary

On Tue, Nov 11, 2014 at 10:06 AM, Anil Ambati  wrote:

> I was asked to post this question in this forum.
>
> We have a requirement to read the PID file created by the Tomcat server
> process on Windows, but we are not able to using RandomAccessFile or
> FileInputStream because the file seems to be
> locked by the Tomcat process.
>
> Why does the Tomcat server keep the PID file locked, preventing other
> processes to even read the file? Is there a work around or solution for
> this problem?
>
>
> Christopher Schultz wrote this in Tomcat user forum:
> 
> I took a quick look, and it looks like the PID file is being created
> with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
> delete the file off the disk when all file handles are closed. So,
> closing the file handle will result in the PID file being deleted.
>
> This option was added because the PID file wasn't being removed if the
> service crashed, which kept the service from restarting (oops).
>
> https://issues.apache.org/jira/browse/DAEMON-183
>
> It seems like an option to control what happens on startup when the
> PID file already exists would be a good idea. You'll have to ask the
> procrun folks about what the options are. It seems reasonable to be
> able to read the PID file, since not being able to read it makes it
> kind of useless other than as a lock-file (i.e. its contents are
> irrelevant).
>
>
> Regards,
>   --
>   *Anilkumar Ambati*  4205 S Miami Blvd
>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail: aamb...@us.ibm.com
>
> --
> "You have no responsibility to live up to what other people think you
> ought to accomplish." -Richard Feynman (1918-1988)
>



-- 
E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
Java Persistence with Hibernate, Second Edition

JUnit in Action, Second Edition 
Spring Batch in Action 
Blog: http://garygregory.wordpress.com
Home: http://garygregory.com/
Tweet! http://twitter.com/GaryGregory

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Gary Gregory

Oops, sorry, please ignore my previous message.

On Tue, Nov 11, 2014 at 10:11 AM, Gary Gregory 
wrote:

> Wrong list. You probably want
> https://tomcat.apache.org/lists.html#tomcat-users
>
> Gary
>
> On Tue, Nov 11, 2014 at 10:06 AM, Anil Ambati  wrote:
>
>> I was asked to post this question in this forum.
>>
>> We have a requirement to read the PID file created by the Tomcat server
>> process on Windows, but we are not able to using RandomAccessFile or
>> FileInputStream because the file seems to be
>> locked by the Tomcat process.
>>
>> Why does the Tomcat server keep the PID file locked, preventing other
>> processes to even read the file? Is there a work around or solution for
>> this problem?
>>
>>
>> Christopher Schultz wrote this in Tomcat user forum:
>> 
>> I took a quick look, and it looks like the PID file is being created
>> with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
>> delete the file off the disk when all file handles are closed. So,
>> closing the file handle will result in the PID file being deleted.
>>
>> This option was added because the PID file wasn't being removed if the
>> service crashed, which kept the service from restarting (oops).
>>
>> https://issues.apache.org/jira/browse/DAEMON-183
>>
>> It seems like an option to control what happens on startup when the
>> PID file already exists would be a good idea. You'll have to ask the
>> procrun folks about what the options are. It seems reasonable to be
>> able to read the PID file, since not being able to read it makes it
>> kind of useless other than as a lock-file (i.e. its contents are
>> irrelevant).
>>
>>
>> Regards,
>>   --
>>   *Anilkumar Ambati*  4205 S Miami Blvd
>>  WebSphere Virtual Enterprise Development  Durham, 27703-9141 Phone:
>> +1-919-254-6152  USA Mobile: +1-919-434-5674e-mail:
>> aamb...@us.ibm.com
>> --
>> "You have no responsibility to live up to what other people think you
>> ought to accomplish." -Richard Feynman (1918-1988)
>>
>
>
>
> --
> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
> Java Persistence with Hibernate, Second Edition
> 
> JUnit in Action, Second Edition 
> Spring Batch in Action 
> Blog: http://garygregory.wordpress.com
> Home: http://garygregory.com/
> Tweet! http://twitter.com/GaryGregory
>



-- 
E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
Java Persistence with Hibernate, Second Edition

JUnit in Action, Second Edition 
Spring Batch in Action 
Blog: http://garygregory.wordpress.com
Home: http://garygregory.com/
Tweet! http://twitter.com/GaryGregory

[daemon] Unable to read tomcat.pid file created by Tomcat process

2014-11-11 Thread Anil Ambati

I was asked to post this question in this forum.

We have a requirement to read the PID file created by the Tomcat server 
process on Windows, but we are not able to using RandomAccessFile or 
FileInputStream because the file seems to be
locked by the Tomcat process. 

Why does the Tomcat server keep the PID file locked, preventing other 
processes to even read the file? Is there a work around or solution for 
this problem?


Christopher Schultz wrote this in Tomcat user forum:

I took a quick look, and it looks like the PID file is being created
with a file option FILE_FLAG_DELETE_ON_CLOSE which causes the OS to
delete the file off the disk when all file handles are closed. So,
closing the file handle will result in the PID file being deleted.

This option was added because the PID file wasn't being removed if the
service crashed, which kept the service from restarting (oops).

https://issues.apache.org/jira/browse/DAEMON-183

It seems like an option to control what happens on startup when the
PID file already exists would be a good idea. You'll have to ask the
procrun folks about what the options are. It seems reasonable to be
able to read the PID file, since not being able to read it makes it
kind of useless other than as a lock-file (i.e. its contents are
irrelevant).


Regards,



Anilkumar Ambati
 4205 S Miami Blvd

WebSphere Virtual Enterprise Development
 Durham, 27703-9141
Phone:
+1-919-254-6152
 USA
Mobile:
+1-919-434-5674
 

e-mail:
aamb...@us.ibm.com
 

"You have no responsibility to live up to what other people think you 
ought to accomplish." -Richard Feynman (1918-1988)

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

[daemon] Unable to read tomcat.pid file created by Tomcat process

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

Re: [daemon] Unable to read tomcat.pid file created by Tomcat process

[daemon] Unable to read tomcat.pid file created by Tomcat process

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