[
https://issues.apache.org/jira/browse/NIFI-3949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16020143#comment-16020143
]
ASF subversion and git services commented on NIFI-3949:
-------------------------------------------------------
Commit a1b07b1e9c388d8642699b1d8b101a606dc5bd6a in nifi's branch
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=a1b07b1 ]
NIFI-3949: Updated Grok Reader to allow for sub-patterns to be used when
determining the schema
This closes #1839.
Signed-off-by: Bryan Bende <[email protected]>
> NullPointerException from GrokReader
> ------------------------------------
>
> Key: NIFI-3949
> URL: https://issues.apache.org/jira/browse/NIFI-3949
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.2.0
> Reporter: Bryan Bende
> Priority: Minor
> Fix For: 1.3.0
>
>
> When creating a GrokReader, I specified an expression of:
> %\{SYSLOGBASE\}%\{GREEDYDATA:message\}
> And I left the default schema strategy of "use fields from grok expression".
> This resulted in an NPE:
> {code}
> java.lang.NullPointerException: null
> at java.util.Objects.requireNonNull(Objects.java:203)
> at
> org.apache.nifi.serialization.record.RecordField.<init>(RecordField.java:50)
> at
> org.apache.nifi.serialization.record.RecordField.<init>(RecordField.java:33)
> at
> org.apache.nifi.grok.GrokReader.createRecordSchema(GrokReader.java:150)
> at org.apache.nifi.grok.GrokReader.preCompile(GrokReader.java:136)
> {code}
> This appears to be because I didn't specify a name for SYSLOGBASE, since I
> was expecting it to see what SYSLOGBASE expands to and then use and named
> fields under that. If we don't want to support that expansion, then we should
> at least validate that all parts of the Grok expression have a name.
> Next I changed to using a schema defined in an AvroSchemaRegistry and
> referencing it by name, but I still got the above exception because the
> preCompile method always attempts to create a RecordSchema from the
> GrokExpression, even if you selected a different strategy.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
