Getting tStatCatcher to Graylog with tRESTClient - java.lang.IllegalStateException: The entity is not backed by an input stream, entity class is : java.lang.String

[Anonymous]

Dear Community,

currently I am trying to send the output of tStatCatcher to a Graylog server via a REST API call. The data must be transferred to the API as a JSON string.

I have created the following process:
tStatCatcher -> tXMLMap -> tRESTClient

In the tXMLMap module, the fields are mapped to an XML structure. Finally, the tRESTClient should transmit the data via POST in JSON format. Otherwise, I have not made any other settings.

tXMLMap-Mapping:


tRESTClient-Config:

Unfortunately, when I run the tRESTClient I get an exception that I can't explain:

Exception in component tRESTClient_1 (SYNC_PARTY)
javax.ws.rs.ProcessingException: java.lang.IllegalStateException: The entity is not backed by an input stream, entity class is : java.lang.String
	at org.apache.cxf.jaxrs.client.WebClient.handleResponse(WebClient.java:1148)
	at org.apache.cxf.jaxrs.client.WebClient.doResponse(WebClient.java:1117)
	at org.apache.cxf.jaxrs.client.WebClient.doChainedInvocation(WebClient.java:1042)
	at org.apache.cxf.jaxrs.client.WebClient.doInvoke(WebClient.java:895)
	at org.apache.cxf.jaxrs.client.WebClient.doInvoke(WebClient.java:863)
	at org.apache.cxf.jaxrs.client.WebClient.invoke(WebClient.java:426)
	at org.apache.cxf.jaxrs.client.WebClient.post(WebClient.java:456)
	at trypartysync.sync_vodster_0_1.SYNC_PARTY.tStatCatcher_1Process(SYNC_PARTY.java:12007)
	at trypartysync.sync_vodster_0_1.SYNC_PARTY.runJobInTOS(SYNC_PARTY.java:12769)
	at trypartysync.sync_vodster_0_1.SYNC_PARTY.main(SYNC_PARTY.java:12613)
Caused by: java.lang.IllegalStateException: The entity is not backed by an input stream, entity class is : java.lang.String
	at org.apache.cxf.jaxrs.impl.ResponseImpl.doReadEntity(ResponseImpl.java:394)
	at org.apache.cxf.jaxrs.client.AbstractClient.readBody(AbstractClient.java:524)
	at org.apache.cxf.jaxrs.client.WebClient.handleResponse(WebClient.java:1129)
	... 9 more

Here is the relevant code:

Do you have an idea how I could solve it or what could be the cause of the problem?

Hopefully you have an idea. Otherwise I would try to make a system call with "curl". But that would just be a stupid workaround. It should only be possible to solve it with Talend.

Thanks in advance for you help.
Volker

[Anonymous · Accepted solution]

You do not need to assign a row value to the tRest. Take a look at here (https://help.talend.com/reader/iYcvdknuprDzYycT3WRU8w/_N82Hv0ivAnxD69EWaC5rA). You need to do a bit more work with the tRest, but you can use a tSetGlobalVar to store your computed JSON and add it to the HTTP Body using the globalMap. You can even test by hardcoding some JSON as a String.

[Anonymous]

Thanks to Rhall's last post, I've got it working like a charm now. Finally 🙂
The statistics are protocolled to my Graylog Server with the help of the HTTP GELF input.

Here is the overview of the working configuration:

The OnComponentOk trigger starts tREST.

Thanks again, Rhall, for your help.

[Anonymous]

Good work and thanks for doing the write up for others to use in the future