Re: [Wrapper-user] Jar works with console, throws exceptions when launched via start?

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Stas,
This is also not something that we normally see.   Which process is
consuming the CPU?  Is it your Java process?

A couple years ago another user had a similar problem.  It turned out
to be caused by a path problem where a configuration file was failing
to be opened.  That was throwing an exception which was being caught
and ignored.  Then the whole thing was in a loop without any delays.
The result was that the program thrashed consuming 100% CPU.

The log information requested in reply to your other email may help
show the cause of this problem as well.

Cheers,
Leif

On Wed, Sep 17, 2008 at 12:13 AM, Stas Oskin <sta...@gm...> wrote:
> Hi.
>
> Additionally, I found something much more worrisome.
>
> When my app runs under the wrapper, it takes MUCH more resources then when
> it runs in console. It basically makes my system unresponsive.
>
> Any idea why is that?
>
> Regards.
>
> 2008/9/16 Stas Oskin <sta...@gm...>
>>
>> Hi.
>>
>> Well, I sorted it out - it was an Enter key handler which somehow
>> interfered and caused a chain reaction.
>>
>> I noticed a very serious issue in the wrapper - sometimes it exits/crashes
>> together with the Java app, and hence can't restart it.
>>
>> Any idea what's going on, and how the wrapper can be reliably used?
>>
>> Regards.
>>
>> 2008/9/16 Leif Mortenson <le...@ta...>
>>>
>>> Stas,
>>> What platform and version are you running on?  I see a reference to a
>>> UNIXProcess so I assume it is not Windows.
>>>
>>> On UNIX versions, there is really no difference in the way the Wrapper
>>> launches the JVM between running in Console or Started as a daemon
>>> process.  There could be differences in the environment variables
>>> available to the Wrapper when it launches however.  For example, the
>>> PATH, or LD_LIBRARY_PATH.   There could also be file permission issues
>>> if they are not being run as the same user.
>>>
>>> Either way however, the Wrapper and JVM appear to be working.   Most
>>> likely something in the application is failing for one of the above
>>> reasons which is leading to it being in an unstable state, thus
>>> causing the exceptions.
>>>
>>> As these appear to be JDBC driver related, I would guess that maybe a
>>> native component of your driver is failing to load.  Does MySQL have a
>>> native driver?  I have used the pure Java driver.   I tried Googling
>>> and found your question but not much else.
>>>
>>> I would be happy to help out with more information.
>>>
>>> Cheers,
>>> Leif
>>>
>>> On Sat, Sep 13, 2008 at 7:11 PM, Stas Oskin <sta...@gm...> wrote:
>>> > Hi.
>>> >
>>> > I'm trying to get my app packaged in jar to work with the Java Wrapper,
>>> > and
>>> > have set up all correctly.When I launch the service in console mode,
>>> > all
>>> > works correctly.
>>> >
>>> > When I do the same with service mode - the service shuts down after a
>>> > few
>>> > seconds, and has the following errors in the log:
>>> >
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 | java.sql.SQLException:
>>> > java.lang.ThreadDeath
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > com.mysql.jdbc.Util.handleNewInstance(Util.java:430)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> >
>>> > com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > java.sql.DriverManager.getConnection(DriverManager.java:582)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:01 |       at
>>> > java.sql.DriverManager.getConnection(DriverManager.java:185)
>>> >
>>> > (Below it my own functions exceptions - but this is a standard JDBC
>>> > connector for MySQL).
>>> >
>>> > And this comes next (where I have function launching external process
>>> > via
>>> > exec function):
>>> >
>>> > INFO   | jvm 1    | 2008/09/13 00:05:03 |
>>> > java.lang.InterruptedException
>>> > INFO   | jvm 1    | 2008/09/13 00:05:03 |       at
>>> > java.lang.Object.wait(Native Method)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:03 |       at
>>> > java.lang.Object.wait(Object.java:485)
>>> > INFO   | jvm 1    | 2008/09/13 00:05:03 |       at
>>> > java.lang.UNIXProcess.waitFor(UNIXProcess.java:165)
>>> >
>>> >
>>> > Any idea what different between the console and start modes, and why
>>> > the
>>> > basic functionality doesn't work in this mode?
>>> >
>>> > Regards.
>>> >
>>> >
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