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Cannot create JSON extractor #3630

edmundoa opened this Issue Mar 16, 2017 · 3 comments


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5 participants

edmundoa commented Mar 16, 2017

On the current master, creating a JSON extractor fails with the current server output:

2017-03-16 17:51:32,969 ERROR: - Extractor persist validation failed.
org.graylog2.plugin.database.ValidationException: null
	at org.graylog2.database.PersistedServiceImpl.embed( ~[classes/:?]
	at org.graylog2.inputs.InputServiceImpl.addExtractor( ~[classes/:?]
	at [classes/:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_112]
	at sun.reflect.NativeMethodAccessorImpl.invoke( ~[?:1.8.0_112]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke( ~[?:1.8.0_112]
	at java.lang.reflect.Method.invoke( ~[?:1.8.0_112]
	at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$ [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.ServerRuntime$ [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.internal.Errors$ [jersey-common-2.25.1.jar:?]
	at org.glassfish.jersey.internal.Errors$ [jersey-common-2.25.1.jar:?]
	at org.glassfish.jersey.internal.Errors.process( [jersey-common-2.25.1.jar:?]
	at org.glassfish.jersey.internal.Errors.process( [jersey-common-2.25.1.jar:?]
	at org.glassfish.jersey.internal.Errors.process( [jersey-common-2.25.1.jar:?]
	at org.glassfish.jersey.process.internal.RequestScope.runInScope( [jersey-common-2.25.1.jar:?]
	at org.glassfish.jersey.server.ServerRuntime.process( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.server.ApplicationHandler.handle( [jersey-server-2.25.1.jar:?]
	at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service( [jersey-container-grizzly2-http-2.25.1.jar:?]
	at org.glassfish.grizzly.http.server.HttpHandler$ [grizzly-http-server-2.3.28.jar:2.3.28]
	at com.codahale.metrics.InstrumentedExecutorService$ [metrics-core-3.2.0.jar:3.2.0]
	at java.util.concurrent.ThreadPoolExecutor.runWorker( [?:1.8.0_112]
	at java.util.concurrent.ThreadPoolExecutor$ [?:1.8.0_112]
	at [?:1.8.0_112]

Using a breakpoint before the PersistedServiceImpl validation, I could see that the validation error is an expected target_field field in the extractor configuration. This field cannot be set for JSON extractors, as the extractor may create many fields from a single one.

Steps to Reproduce (for bugs)

  1. Fill out the create JSON extractor form. Here is the configuration I used:
  "title": "JSON extractor",
  "cut_or_copy": "copy",
  "source_field": "message",
  "target_field": "",
  "extractor_type": "json",
  "extractor_config": {
    "list_separator": ", ",
    "key_separator": "_",
    "kv_separator": "=",
    "key_prefix": "",
    "replace_key_whitespace": true,
    "key_whitespace_replacement": "_"
  "converters": {},
  "condition_type": "none",
  "condition_value": ""
  1. Press on create extractor and see that the server returns a 400 code and the error mentioned above is in the logs

Your Environment

  • Graylog Version: Graylog 2.3.0-SNAPSHOT (4802bbb)

@edmundoa edmundoa added the bug label Mar 16, 2017


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joschi commented Mar 17, 2017

This was probably introduced in 1aefec0.

The validators for extractors were never run before (see

public Map<String, Validator> getEmbeddedValidations(String key) {
if (EMBEDDED_EXTRACTORS.equals(key)) {
final ImmutableMap.Builder<String, Validator> validations = ImmutableMap.builder();
validations.put(Extractor.FIELD_ID, new FilledStringValidator());
validations.put(Extractor.FIELD_TITLE, new FilledStringValidator());
validations.put(Extractor.FIELD_TYPE, new FilledStringValidator());
validations.put(Extractor.FIELD_CURSOR_STRATEGY, new FilledStringValidator());
validations.put(Extractor.FIELD_TARGET_FIELD, new FilledStringValidator());
validations.put(Extractor.FIELD_SOURCE_FIELD, new FilledStringValidator());
validations.put(Extractor.FIELD_CREATOR_USER_ID, new FilledStringValidator());
validations.put(Extractor.FIELD_EXTRACTOR_CONFIG, new MapValidator());

So the question is, should we:

  1. Fix the validations (e. g. target_field is optional)?
  2. Remove the validations altogether, leading to the same (wrong) behavior as before?

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dennisoelkers commented Mar 17, 2017

My vote goes for 1.).


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kroepke commented Mar 17, 2017

I also vote for 1

joschi added a commit that referenced this issue Mar 17, 2017

@joschi joschi added this to the 2.3.0 milestone Mar 17, 2017

@joschi joschi self-assigned this Mar 17, 2017

@joschi joschi added the in progress label Mar 17, 2017

@jalogisch jalogisch added the triaged label Mar 27, 2017

@wafflebot wafflebot bot removed the in progress label Apr 19, 2017

kroepke added a commit that referenced this issue Apr 19, 2017

Fix OptionalStringValidator and validations for extractors (#3633)
* Fix OptionalStringValidator and validations for extractors

Fixes #3630

* Update LimitedOptionalStringValidatorTest to allow empty strings
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