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Eがデータベース、任意のタプルを放出するため、無ニーズの情報を持続し、最終的な1、である。我々は次のトポロジタプルを放つべきではないApacheの嵐の最終的なボルト？
spout A -> bolt B -> bolt C -> bolt E
とボルトを持っていると仮定すると、その後、私は例外
Exception in thread "main" java.io.IOException: org.apache.storm.thrift.protocol.TProtocolException: Required field 'output_fields' is unset! Struct:StreamInfo(output_fields:null, direct:false)
at storm.petrel.ThriftReader.read(ThriftReader.java:77)
at storm.petrel.GenericTopology.readTopology(GenericTopology.java:36)
at storm.petrel.GenericTopology.main(GenericTopology.java:53)
Caused by: org.apache.storm.thrift.protocol.TProtocolException: Required field 'output_fields' is unset! Struct:StreamInfo(output_fields:null, direct:false)
at org.apache.storm.generated.StreamInfo.validate(StreamInfo.java:407)
at org.apache.storm.generated.StreamInfo$StreamInfoStandardScheme.read(StreamInfo.java:485)
at org.apache.storm.generated.StreamInfo$StreamInfoStandardScheme.read(StreamInfo.java:441)
at org.apache.storm.generated.StreamInfo.read(StreamInfo.java:377)
at org.apache.storm.generated.ComponentCommon$ComponentCommonStandardScheme.read(ComponentCommon.java:681)
at org.apache.storm.generated.ComponentCommon$ComponentCommonStandardScheme.read(ComponentCommon.java:636)
at org.apache.storm.generated.ComponentCommon.read(ComponentCommon.java:552)
at org.apache.storm.generated.Bolt$BoltStandardScheme.read(Bolt.java:451)
at org.apache.storm.generated.Bolt$BoltStandardScheme.read(Bolt.java:427)
at org.apache.storm.generated.Bolt.read(Bolt.java:358)
at org.apache.storm.generated.StormTopology$StormTopologyStandardScheme.read(StormTopology.java:727)
at org.apache.storm.generated.StormTopology$StormTopologyStandardScheme.read(StormTopology.java:683)
at org.apache.storm.generated.StormTopology.read(StormTopology.java:595)
at storm.petrel.ThriftReader.read(ThriftReader.java:75)
... 2 more