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https://issues.apache.org/jira/browse/NIFI-5169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16476324#comment-16476324
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ASF GitHub Bot commented on NIFI-5169:
--------------------------------------
Github user MikeThomsen commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2705#discussion_r188393536
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/AbstractJsonPathProcessor.java
---
@@ -112,10 +111,10 @@ static String getResultRepresentation(Object
jsonPathResult, String defaultValue
public ValidationResult validate(final String subject, final
String input, final ValidationContext context) {
String error = null;
if (isStale(subject, input)) {
- if (JsonPathExpressionValidator.isValidExpression(input)) {
+ try {
JsonPath compiledJsonPath = JsonPath.compile(input);
cacheComputedValue(subject, input, compiledJsonPath);
--- End diff --
I should have a `isBlank` check there, so good catch.
> Upgrade to JsonPath 2.4.0
> -------------------------
>
> Key: NIFI-5169
> URL: https://issues.apache.org/jira/browse/NIFI-5169
> Project: Apache NiFi
> Issue Type: Task
> Affects Versions: 1.6.0
> Reporter: Dennis Dahlmann
> Assignee: Mike Thomsen
> Priority: Major
> Labels: JSON
> Fix For: 1.7.0
>
>
> A newer version (2.4.0) of JsonPath is availabel atÂ
> [github|[https://github.com/json-path/JsonPath].]
> With this version a currently existing bug is fixed, take this JSON
> {"Epoch timestamp [s]":"1486373924","temperature [C]":"20"}
> and try to get the value of "Epoch timestamp [s]" with $.['Epoch timestamp
> [s]'] this will result in an empty result with version 2.0.0 which is
> currently, but with version 2.4.0 you get the right value.
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