Oracle 12C数据库报ORA-7445 [qcdlgcd] ，前台报No more data to read from socket错误解决方法

问题描述：

1. 在EAS Cloud8.6+Oracle 12.1.0.2环境中, 执行EAS Cloud凭证新增，在物料选择时，弹出F7功能报错，报No more data to read from socket错误。

2. 通过几家客户验证，只要用了Oracle 12.1.0.2数据库，做了大数据量的查询，都触发了No more data to read from socket报错。

解决方案：

1.查看客户端的client\logs\log4j.log、服务端\eas\server\profiles\server*\logs\apusic.log日志可见如下详细报错：

java.sql.SQLException: No more data to read from socket

at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1157)

at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:350)

at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227)

at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)

at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:208)

at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:879)

at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(Unknown Source)

at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(Unknown Source)

at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedState