HttpClient不可序列化异常

我正在尝试实施一个基本的1喷口 - 1螺栓风暴拓扑.我有一个Storm Bolt使用Apache HttpClient(4.3.1)发出HTTP请求.但是,当我运行它时,我得到以下异常:

[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 

有人见过这个吗？我知道Storm本身在内部使用HTTP Client(4.1.1).我试图用4.3.1版本替换内部库,我又得到了一个错误:

Exception in thread "main" java.lang.NoSuchFieldError: INSTANCE
    at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.(DefaultHttpRequestWriterFactory.java:52)
    at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.(DefaultHttpRequestWriterFactory.java:56)
    at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.(DefaultHttpRequestWriterFactory.java:46)
    at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.(ManagedHttpClientConnectionFactory.java:72)
    at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.(ManagedHttpClientConnectionFactory.java:84)
    at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.(ManagedHttpClientConnectionFactory.java:59)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$InternalConnectionFactory.(PoolingHttpClientConnectionManager.java:487)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:147)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:136)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(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.(DataFetcherBolt.java:34)
    at app.storm.StormTopology.main(StormTopology.java:18)

bsam.. 6

我从谷歌风暴论坛项目得到了答案.这是该帖子的链接:

https://groups.google.com/forum/#!topic/storm-user/vdfamKeR9Lk

修复是在Bolt类的prepare方法中实例化HttpClient实例.