Question

我在使用AdoNetAppender时遇到了麻烦。对于长达2000个字符的消息，事情很好。如果消息（PI_S_MESSAGE）是＆gt;则一切都会崩溃。 2000个字符。我的数据库是Oracle 10g，下面显示的是appender配置。初始化appender时，动态注入连接字符串。

<?xml version="1.0" encoding="utf-8" ?><log4net>
<appender name="MyAppender" type="log4net.Appender.AdoNetAppender">
  <bufferSize value="0" />
  <connectionType value="System.Data.OracleClient.OracleConnection, System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />      
  <commandText value="INSERT INTO LOG_TABLE(Datetime,Log_Level,userid,Message,machine) VALUES (:PI_D_DATE, :PI_S_LEVEL, :PI_S_USERID, :PI_S_MESSAGE, :PI_S_MACHINE)" />      
  <parameter>
    <parameterName value=":PI_D_DATE" />
    <dbType value="DateTime" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%d{dd-MMM-yyyy HH:mm:ss}" />
    </layout>
  </parameter>     
  <parameter>
    <parameterName value=":PI_S_LEVEL" />
    <dbType value="String" />
    <size value="10" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%level" />
    </layout>
  </parameter>     
  <parameter>
    <parameterName value=":PI_S_USERID" />
    <dbType value="String" />
    <size value="255" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%u" />
    </layout>
  </parameter>
  <parameter>
    <parameterName value=":PI_S_MESSAGE" />
    <dbType value="String" />
    <size value="4000" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%message" />
    </layout>
  </parameter>
  <parameter>
    <parameterName value=":PI_S_MACHINE" />
    <dbType value="String" />
    <size value="255" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%property{log4net:HostName}" />
    </layout>
  </parameter>
</appender>
<root>
  <level value="All"/>
  <appender-ref ref="MyAppender"/>
</root>

启用调试模式后，它会发出oracle错误

log4net:ERROR [AdoNetAppender] Exception while writing to database
System.Data.OracleClient.OracleException: ORA-01461: can bind a LONG value only for insert into a LONG column

   at System.Data.OracleClient.OracleConnection.CheckError(OciErrorHandle errorHandle, Int32 rc)

有人可以帮忙吗？

Answer 1

通过将dbType参数的PI_S_MESSAGE属性更改为AnsiString来解决此问题。也许它在与dbType一起用作nvarchar时尝试String绑定。

虽然无关，但这个帖子救了我的屁股。 https://forum.hibernate.org/viewtopic.php?p=2369841

新配置。

<?xml version="1.0" encoding="utf-8" ?><log4net>
<appender name="MyAppender" type="log4net.Appender.AdoNetAppender">
  <bufferSize value="0" />
  <connectionType value="System.Data.OracleClient.OracleConnection, System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />      
  <commandText value="INSERT INTO LOG_TABLE(Datetime,Log_Level,userid,Message,machine) VALUES (:PI_D_DATE, :PI_S_LEVEL, :PI_S_USERID, :PI_S_MESSAGE, :PI_S_MACHINE)" />      
  <parameter>
    <parameterName value=":PI_D_DATE" />
    <dbType value="DateTime" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%d{dd-MMM-yyyy HH:mm:ss}" />
    </layout>
  </parameter>     
  <parameter>
    <parameterName value=":PI_S_LEVEL" />
    <dbType value="String" />
    <size value="10" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%level" />
    </layout>
  </parameter>     
  <parameter>
    <parameterName value=":PI_S_USERID" />
    <dbType value="String" />
    <size value="255" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%u" />
    </layout>
  </parameter>
  <parameter>
    <parameterName value=":PI_S_MESSAGE" />
    <dbType value="AnsiString" />
    <size value="4000" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%message" />
    </layout>
  </parameter>
  <parameter>
    <parameterName value=":PI_S_MACHINE" />
    <dbType value="String" />
    <size value="255" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%property{log4net:HostName}" />
    </layout>
  </parameter>
</appender>
<root>
  <level value="All"/>
  <appender-ref ref="MyAppender"/>
</root>

log4net AdoNetAppender失败的消息＆gt; 2000 char

1 个答案: