Not JSON Serializable error tf2.0

解决TFLite转换中NotJSONSerializable错误
本文介绍了解决在将模型转换为TFLite格式时遇到的NotJSONSerializable错误的方法。此错误通常发生在使用tf.keras.activations时,可通过升级到tf nightly build '2.0.0-dev20190802'或手动修改源码来解决。

背景:使用的模型需要转换成tflite,用tf.keras重写后,因为用到了 tf.keras.activations operators 所以在model.save的时候会报错Not JSON Serializable error。应该是类型不支持,造成node json序列化失败。

解决方法:

1. 官方tf nightly build '2.0.0-dev20190802' 版本已经fixed 这个bug.

2. 自己修改源码。修改方法

3. 

tf.keras.layers.Lambd(lambda t: tf.keras.activations.sigmoid(t))(x)

 

Caused by: org.flowable.common.engine.api.FlowableException: Couldn't deserialize object in variable 'formData' at org.flowable.variable.service.impl.types.SerializableType.deserialize(SerializableType.java:154) at org.flowable.variable.service.impl.types.SerializableType.getValue(SerializableType.java:73) at org.flowable.variable.service.impl.persistence.entity.VariableInstanceEntityImpl.getValue(VariableInstanceEntityImpl.java:134) at org.flowable.variable.service.impl.persistence.entity.VariableInitializingList.initializeVariable(VariableInitializingList.java:66) at org.flowable.variable.service.impl.persistence.entity.VariableInitializingList.add(VariableInitializingList.java:41) at org.flowable.variable.service.impl.persistence.entity.VariableInitializingList.add(VariableInitializingList.java:29) at org.apache.ibatis.reflection.wrapper.CollectionWrapper.add(CollectionWrapper.java:93) at org.apache.ibatis.reflection.MetaObject.add(MetaObject.java:158) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.linkObjects(DefaultResultSetHandler.java:1106) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyNestedResultMappings(DefaultResultSetHandler.java:955) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:422) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForNestedResultMap(DefaultResultSetHandler.java:910) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:327) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:302) at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:195) at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:65) at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79) at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63) at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:325) at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:89) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:151) ... 156 common frames omitted Caused by: org.flowable.common.engine.api.FlowableClassLoadingException: Class not found: com.nbcio.modules.demo.test_demo.entity.TestDemo at org.flowable.common.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:89) at org.flowable.variable.service.impl.types.SerializableType$1.resolveClass(SerializableType.java:197) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1988) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1852) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2186) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1669) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:503) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:461) at org.flowable.variable.service.impl.types.SerializableType.deserialize(SerializableType.java:150) ... 178 common frames omitted Caused by: java.lang.ClassNotFoundException: com.nbcio.modules.demo.test_demo.entity.TestDemo at org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.loadClass(TomcatEmbeddedWebappClassLoader.java:72) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1188) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at org.flowable.common.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:328) at org.flowable.common.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:70) ... 186 common frames omitted
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09-05
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