[slf4j-user] Does slf4j have a conflict with Spring Boot or Java Process Runtime, because it stops logging after a while

[Navin Ipe]

Thank you.

On Tue, Jun 28, 2016 at 11:44 AM, Chetan Mehrotra <chetan.mehrotra at gmail.com
> wrote:

> On Tue, Jun 28, 2016 at 11:15 AM, Navin Ipe
> <navin.ipe at searchlighthealth.com> wrote:
> > Even if the logs get accumulated in the output stream, why would the
> program
> > hang? I'd have assumed the OutputStream is on a separate thread.
>
> That needs to be done by the caller i.e. program which is executing
> the process. Have a look at [1]. Note it has nothing specific to
> slf4j, it would happen with any code flow which writes to stdout
>
> ----
> By default, the created subprocess does not have its own terminal or
> console. All its standard I/O (i.e. stdin, stdout, stderr) operations
> will be redirected to the parent process, where they can be accessed
> via the streams obtained using the methods
> getOutputStream(),getInputStream(), and getErrorStream(). The parent
> process uses these streams to feed input to and get output from the
> subprocess. Because some native platforms only provide limited buffer
> size for standard input and output streams, **failure to promptly
> write the input stream or read the output stream of the subprocess may
> cause the subprocess to block, or even deadlock.**
> ----
>
> For an example see PumpStreamHandler [2] from commons-exec which does
> this properly.
>
> Chetan Mehrotra
> [1] https://docs.oracle.com/javase/7/docs/api/java/lang/Process.html
> [2]
> https://github.com/apache/commons-exec/blob/trunk/src/main/java/org/apache/commons/exec/PumpStreamHandler.java
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-- 
Regards,
Navin
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