# Error java.lang.NoClassDefFoundError: org/elasticsearch/shield/transport/netty/HandshakeWaitingHandler$1

**URL:** <https://discuss.elastic.co/t/error-java-lang-noclassdeffounderror-org-elasticsearch-shield-transport-netty-handshakewaitinghandler-1/86263>\
**Category:** Elasticsearch\
**Created:** [May 18, 2017, 1:02pm UTC](https://discuss.elastic.co/t/error-java-lang-noclassdeffounderror-org-elasticsearch-shield-transport-netty-handshakewaitinghandler-1/86263 "2017-05-18T13:02:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![victorpoluceno](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/victorpoluceno/32/18333_2.png) [@victorpoluceno](https://discuss.elastic.co/u/victorpoluceno)\
**Post date:** [May 18, 2017, 1:02pm UTC](https://discuss.elastic.co/t/error-java-lang-noclassdeffounderror-org-elasticsearch-shield-transport-netty-handshakewaitinghandler-1/86263/1 "2017-05-18T13:02:20Z")

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I getting a weird transient error when connecting to Elastic Cloud. This error happens sometimes and I can not find its root cause. I am using Elastic Search 2.4 with shield 2.2.0 and Apache Flink 1.2.0. I have configured connections params following the Elastic docs.

```
2017-05-18 14:36:27,026 WARN org.elasticsearch.shield.transport.netty - [Angel Dust] exception caught on transport layer [[id: XX, /XX.XX.XX.XX:42374 => XXXXX.us-east-1.aws.found.io/XX.XX.XX.XX:9343]], closing connection
java.lang.NoClassDefFoundError: org/elasticsearch/shield/transport/netty/HandshakeWaitingHandler$1
	at org.elasticsearch.shield.transport.netty.HandshakeWaitingHandler.channelConnected(HandshakeWaitingHandler.java:57)
	at org.jboss.netty.handler.ssl.SslHandler.channelConnected(SslHandler.java:1578)
	at org.jboss.netty.channel.Channels.fireChannelConnected(Channels.java:227)
	at org.jboss.netty.channel.socket.nio.NioWorker$RegisterTask.run(NioWorker.java:162)
	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:372)
	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:296)
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 15, 2017, 1:02pm UTC](https://discuss.elastic.co/t/error-java-lang-noclassdeffounderror-org-elasticsearch-shield-transport-netty-handshakewaitinghandler-1/86263/2 "2017-06-15T13:02:24Z")

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