Yeah worth noting that such an error would present anywhere in the flow.
But the root cause is more likely related to config or system limitations
or possibly a leak of classes.  Upgrading to latest is highly recommended.

On Tue, Jul 21, 2020 at 10:59 PM Mohit Jain <[email protected]> wrote:

> Thanks Joe,
>
> Yes it is mostly happening with the HDFS processors, but I found a
> RouteText processor  in the nifi-app.log throwing the same error as well.
>
> Sure I’ll look into the latest nifi version.
>
> Thanks,
> Mohit
>
>
> Get Outlook for iOS<https://aka.ms/o0ukef>
> ________________________________
> From: Joe Witt <[email protected]>
> Sent: Wednesday, July 22, 2020 11:04:14 AM
> To: [email protected] <[email protected]>
> Subject: Re: Urgent: HDFS processors throwing OOM - Compressed class space
> exception
>
> The fact that the class space is being mentioned is interesting. You should
> try a more recent version of nifi to see if this has been addressed as the
> hdfs processors tend to get a lot of attention and bugs there get dealt
> with quickly.
>
> Thanks
>
> On Tue, Jul 21, 2020 at 10:19 PM Mohit Jain <[email protected]>
> wrote:
>
> > Hi Joe,
> >
> > Thanks for responding.
> >
> > Sure I’ll keep that in mind in my future mails.
> >
> > Following are the details:
> >
> > NiFi version: 1.9.0
> > Java version: java 8
> > OS: Linux based
> >
> > Nifi properties change:
> > There were issues with java heap space so we increased it to 16g
> >
> > Thanks,
> > Mohit
> >
> >
> > Get Outlook for iOS<https://aka.ms/o0ukef>
> > ________________________________
> > From: Joe Witt <[email protected]>
> > Sent: Wednesday, July 22, 2020 10:03:59 AM
> > To: [email protected] <[email protected]>
> > Subject: Re: Urgent: HDFS processors throwing OOM - Compressed class
> space
> > exception
> >
> > Mohit
> >
> > This is probably better for the users list.
> >
> > It is probably never ideal to send an email subject of ‘Urgent’ to an
> open
> > source community.
> >
> > Please when reporting an issue provide information on the version of
> nifi,
> > java, and os.
> >
> > Also in this case what settings changes have you made in nifi.properties
> > and such.  This seems likely to be a config/install issue or setting that
> > needs to be changed.
> >
> > thanks
> >
> > On Tue, Jul 21, 2020 at 8:35 PM Mohit Jain <[email protected]>
> > wrote:
> >
> > > Hi team,
> > >
> > > I’ve been facing the issue while using any HDFS processor, e.g. -
> PutHDFS
> > > throws the error -
> > > Failed to write to HDFS due to compressed class space:
> > > java.lang.OutOFMemoryError
> > >
> > > Eventually the node gets disconnected.
> > >
> > > Any help would be appreciated.
> > >
> > > Regards,
> > > Mohit
> > >
> > > [image: Image.jpeg]
> > > Get Outlook for iOS <https://aka.ms/o0ukef>
> > >
> >
>

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