Re: Issue java.io.StreamCorruptedException

Hi there,

I suspect this has nothing to do with CLOB and String. It may be other attributes. So a few questions:

1. What version of Cayenne is this?
2. Do you have a longer stack trace? 
3. Could you check the logs preceding the exception for messages like "Haven't found suitable ExtendedType for class..."

Andrus

> On Oct 31, 2020, at 5:51 PM, Giuseppe De Rosa <[email protected]> wrote:
> 
> I'm trying to make a simple select query but receive this error:
> 
> java.io.StreamCorruptedException: invalid stream header: 78780A1F 
> at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:857)
> 
> In datamap I have a db-attribute of type CLOB that I want read as a simple String.
> 
> <db-entity name="DISC">
>        <db-attribute name="DATE" type="TIMESTAMP" isMandatory="true" length="7"/>
>        <db-attribute name="ID" type="INTEGER" isPrimaryKey="true" isMandatory="true"/>
>        <db-attribute name="FLAG" type="VARCHAR" isMandatory="true"/>
>        <db-attribute name="REQUEST" type="CLOB" isMandatory="false"/>
>        <db-key-generator>
>            <db-generator-type>ORACLE</db-generator-type>
>            <db-generator-name>DISC_SEQ</db-generator-name>
>            <db-key-cache-size>1</db-key-cache-size>
>        </db-key-generator>
> </db-entity>
> <obj-entity name="Disc" className="it.pack.dao.Disc" dbEntityName="DISC">
>        <obj-attribute name="date" type="java.time.LocalDateTime" db-attribute-path="DATE"/>
>        <obj-attribute name="id" type="java.lang.Integer" db-attribute-path="ID"/>
>        <obj-attribute name="flag" type="java.lang.String" db-attribute-path="FLAG"/>
>        <obj-attribute name="request" type="java.lang.String" db-attribute-path="REQUEST"/>
> </obj-entity>
> 
> I think that CLOB cannot map to java.lang.String but how can I read it?