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POHttpClient not Serializable Exception
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  1. POHttpClient not Serializable Exception
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    copied!<p>I am trying to implement a basic 1 spout - 1 bolt Storm Topology. I have a Storm Bolt to make an HTTP Request using the Apache HttpClient (4.3.1). But, I get the following exception when I run it: </p> <pre><code>[main] ERROR org.apache.zookeeper.server.NIOServerCnxn - Thread Thread[main,5,main] died java.lang.RuntimeException: java.io.NotSerializableException: org.apache.http.impl.client.InternalHttpClient at backtype.storm.utils.Utils.serialize(Utils.java:56) at backtype.storm.topology.TopologyBuilder.createTopology(TopologyBuilder.java:89) at app.storm.StormTopology.main(StormTopology.java:26) Caused by: java.io.NotSerializableException: org.apache.http.impl.client.InternalHttpClient at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1183) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347) at backtype.storm.utils.Utils.serialize(Utils.java:52) ... 2 more </code></pre> <p>Anyone else seen this? I know Storm itself uses the HTTP Client (4.1.1) internally. I tried to replace the internal library with the 4.3.1 version and I got another error:</p> <pre><code>Exception in thread "main" java.lang.NoSuchFieldError: INSTANCE at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.&lt;init&gt;(DefaultHttpRequestWriterFactory.java:52) at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.&lt;init&gt;(DefaultHttpRequestWriterFactory.java:56) at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.&lt;clinit&gt;(DefaultHttpRequestWriterFactory.java:46) at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.&lt;init&gt;(ManagedHttpClientConnectionFactory.java:72) at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.&lt;init&gt;(ManagedHttpClientConnectionFactory.java:84) at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.&lt;clinit&gt;(ManagedHttpClientConnectionFactory.java:59) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$InternalConnectionFactory.&lt;init&gt;(PoolingHttpClientConnectionManager.java:487) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.&lt;init&gt;(PoolingHttpClientConnectionManager.java:147) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.&lt;init&gt;(PoolingHttpClientConnectionManager.java:136) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.&lt;init&gt;(PoolingHttpClientConnectionManager.java:112) at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:727) at org.apache.http.impl.client.HttpClients.createDefault(HttpClients.java:58) at app.storm.bolts.DataFetcherBolt.&lt;init&gt;(DataFetcherBolt.java:34) at app.storm.StormTopology.main(StormTopology.java:18) </code></pre>
 

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