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https://issues.apache.org/jira/browse/NIFI-3853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16003065#comment-16003065
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Matt Gilman edited comment on NIFI-3853 at 5/9/17 5:07 PM:
-----------------------------------------------------------
Some characters actually need to be filtered out as even after escaping they
cannot be represented in XML [1].
[1]
https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringEscapeUtils.html#escapeXml10-java.lang.String-
was (Author: mcgilman):
Some characters actually need to be filtered out as even after escaping they
cannot be represented in XML.
> Escape configurations prior to writing flow.xml
> -----------------------------------------------
>
> Key: NIFI-3853
> URL: https://issues.apache.org/jira/browse/NIFI-3853
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Matt Gilman
> Assignee: Matt Gilman
> Priority: Critical
>
> If invalid characters are entered through the UI, they can corrupt the
> flow.xml.gz making it unparsable on future restarts. Once in this state, the
> flow.xml.gz needs to be hand-edited to remove the invalid characters. The
> following characters may cause issues:
> {code}
> #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
> {code}
> {code}
> [#x7F-#x84] | [#x86-#x9F]
> {code}
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