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From "ASF subversion and git services (JIRA)" <>
Subject [jira] [Commented] (NIFI-1374) need to better document Java 7 class and codecache limitation in Admin Guide
Date Sun, 10 Jan 2016 19:50:39 GMT


ASF subversion and git services commented on NIFI-1374:

Commit 684f48ff926c83c8c6529985410b87d07935826e in nifi's branch refs/heads/master from [~joewitt]
[;h=684f48f ]

NIFI-1374 updated admin guide to provide advice for permgen and codecache

Signed-off-by: Aldrin Piri <>

> need to better document Java 7 class and codecache limitation in Admin Guide
> ----------------------------------------------------------------------------
>                 Key: NIFI-1374
>                 URL:
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>            Reporter: Matthew Clarke
>            Assignee: Joseph Witt
>            Priority: Minor
>              Labels: beginner, newbie
>             Fix For: 0.5.0
>         Attachments: 0001-NIFI-1374-updated-admin-guide-to-provide-advice-for-.patch
> The documentation provided in NiFi does not include enough information on the default
limitations of Java 7 that can offer result in Out of Memory: Permgen conditions.  The Admin
Guide should be updated in 2 places:
> 1. under system Requirements we should add a note about using Java 7 and point them to
additional guidance under the bootstrap properties section.
> 2, In the bootstrap properties section we should document the commented out java 7 properties
in the file and explain why they should have they should be used when running with Java 7.
> Further, the codecache issues present in Java 7 and Java 8 also warrant commentary as
the results can be terrible and extremely hard to figure out.

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