Problem with gelf tcp input

Hello. I’ll try to check GELF TCP INPUT with"

echo -n -e '{ "version": "1.1", "host": "example.org", "short_message": "A short message", "level": 5, "_some_info": "foo" }'"\0" | nc -w0 graylog.example.com 12201
But I have error:
2019-08-03 16:45:18,256 ERROR: org.graylog2.shared.buffers.processors.DecodingProcessor - Unable to decode raw message RawMessage{id=c8c6d551-b5db-11e9-9c44-024222dda4a5, journalOffset=1678, codec=CEF, payloadSize=169, timestamp=2019-08-03T10:45:18.245Z, remoteAddress=/127.0.0.1:39216} on input <5d456572b49e23000d3cb1d1>. 2019-08-03 16:45:18,257 ERROR: org.graylog2.shared.buffers.processors.DecodingProcessor - Error processing message RawMessage{id=c8c6d551-b5db-11e9-9c44-024222dda4a5, journalOffset=1678, codec=CEF, payloadSize=169, timestamp=2019-08-03T10:45:18.245Z, remoteAddress=/127.0.0.1:39216} java.lang.NullPointerException: null at org.graylog.plugins.cef.parser.MappedMessage.<init>(MappedMessage.java:37) ~[graylog.jar:?] at org.graylog.plugins.cef.codec.CEFCodec.decodeCEF(CEFCodec.java:128) ~[graylog.jar:?] at org.graylog.plugins.cef.codec.CEFCodec.decode(CEFCodec.java:117) ~[graylog.jar:?] at org.graylog2.shared.buffers.processors.DecodingProcessor.processMessage(DecodingProcessor.java:150) ~[graylog.jar:?] at org.graylog2.shared.buffers.processors.DecodingProcessor.onEvent(DecodingProcessor.java:91) [graylog.jar:?] at org.graylog2.shared.buffers.processors.ProcessBufferProcessor.onEvent(ProcessBufferProcessor.java:86) [graylog.jar:?] at org.graylog2.shared.buffers.processors.ProcessBufferProcessor.onEvent(ProcessBufferProcessor.java:45) [graylog.jar:?] at com.lmax.disruptor.WorkProcessor.run(WorkProcessor.java:143) [graylog.jar:?] at com.codahale.metrics.InstrumentedThreadFactory$InstrumentedRunnable.run(InstrumentedThreadFactory.java:66) [graylog.jar:?] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Graylog 3.0.2

Any can help with that problem?

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