Sometimes I need to kill java

[Frank Murphy]

F20 but general question.

I test both upstream and Fedora Azureus (Vuze)
use openjdk for both.

I created an azvuze.service
to automate restarts (during the night)

Sometimes openjdk stays, sometimes crashes out.
If it stays, it prevents restart.
by either service file, manually typing # azureus.

How can I automate "killall -SIGHUP java",
only when azureus || vuze is refusing to start with:
journalctl | grep azureus
 StartSocket: passing startup args to already-running Azureus java
process listening on [127.0.0.1: NNNN]
azureus[2297]: StartServer ERROR: unable to bind to 127.0.0.1:NNNN
listening for passed torrent info: Address already in use

Both fedora-azureus and upstream-vuze
are similar but for paths

azvuze.service ============

# restart azureus
#

[Unit]
Description=Vuze (Upstream) 
DefaultDependencies=no
Requires=lightdm.service
After=graphical.target

[Service]
User=makeyup
Type=forking
Restart=always
RestartSec=180
RemainAfterExit=no
TimeoutStartSec=0
Environment=DISPLAY=:0
# ExecStartPre=/usr/bin/killall -SIGHUP java ## not a good idea here.
ExecStartPre=/usr/local/scripts/ulimit
ExecStart=/home/makeyup/Upstream_Vuze/azureus

[Install]
WantedBy=graphical.target
========================

[Ian Malone]

On 11 October 2013 12:10, Frank Murphy  wrote:
> F20 but general question.
>
> I test both upstream and Fedora Azureus (Vuze)
> use openjdk for both.
>
> I created an azvuze.service
> to automate restarts (during the night)
>
> Sometimes openjdk stays, sometimes crashes out.
> If it stays, it prevents restart.
> by either service file, manually typing # azureus.
>
> How can I automate "killall -SIGHUP java",
> only when azureus || vuze is refusing to start with:
> journalctl | grep azureus
>  StartSocket: passing startup args to already-running Azureus java
> process listening on [127.0.0.1: NNNN]
> azureus[2297]: StartServer ERROR: unable to bind to 127.0.0.1:NNNN

For example:
journalctl | grep azureus | grep "ERROR: unable to bind" > /dev/null
&& killall -SIGHUP java

More elegant to be able to detect this failure at the attempt to start
the azureus client, do the kill and then retry the start (while
checking for loops). But that mightn't be possible depending on how it
reacts to your attempt to restart it.

[Frank Murphy]

On Fri, 11 Oct 2013 12:30:25 +0100
Ian Malone  wrote:
> On 11 October 2013 12:10, Frank Murphy  wrote:
> For example:
> journalctl | grep azureus | grep "ERROR: unable to bind" > /dev/null
> && killall -SIGHUP java

Thanks Ian,
> More elegant to be able to detect this failure at the attempt to
> start the azureus client, do the kill and then retry the start
> (while checking for loops). But that mightn't be possible depending
> on how it reacts to your attempt to restart it.

That could work as a script in "ExecStartPre=/above example as script"
Will give it a spin.