应用前端报错：
ORA-01460: unimplemented or unreasonable conversion requested
据排查分析是在处理clob类型时偶尔发生这个报错，再次运行便恢复正常，而且已经持续了一段时间。
2022-06-27 15:39:54,062 [DEBUG] com.mchange.v2.c3p0.impl.NewPooledConnection com.mchange.v2.c3p0.impl.NewPooledConnection@5f5d43a2 handling a throwable.
java.sql.SQLException: ORA-01460: unimplemented or unreasonable conversion requested
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:951)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:513)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:205)
at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:1036)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1336)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3608)
at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3709)
at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4735)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1090)
at com.mchange.v2.c3p0.impl.NewProxyCallableStatement.execute(NewProxyCallableStatement.java:3044)
at com.xxxx.cop.db.DBHelper.execute(DBHelper.java:320)
at com.xxxx.cop.xscript.scriptmodel.ProcedureHandler.execute(ProcedureHandler.java:91)
at com.xxxx.cop.xscript.scriptmodel.XScriptModel.runModel(XScriptModel.java:35)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runModel(XScriptRuntime.java:223)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:177)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runArrows(XScriptRuntime.java:198)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.execute(XScriptRuntime.java:168)
at com.xxxx.cop.xscript.runtime.XScriptRuntime.runScript(XScriptRuntime.java:86)
at com.xxxx.cop.dispatcher.engine.flow.BaseService.runScript(BaseService.java:77)
at com.xxxx.cop.dispatcher.engine.flow.BaseService.runScript(BaseService.java:61)
at com.xxxx.cop.dispatcher.engine.flow.CreateProcess.createProcess(CreateProcess.java:95)
at sun.reflect.GeneratedMethodAccessor1836.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.xxxx.cop.dispatcher.engine.execute.SunDSExecEngine.invoke(SunDSExecEngine.java:118)
at com.xxxx.cop.dispatcher.engine.execute.SunDSExecEngine.execute(SunDSExecEngine.java:50)
at sun.reflect.GeneratedMethodAccessor1829.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.xxxx.cop.util.reflect.ReflectHandler.invoke(ReflectHandler.java:224)
at com.xxxx.cop.util.reflect.ReflectHandler.invoke(ReflectHandler.java:162)
at com.xxxx.cop.communication.SocketMSGUtil.bussProcess(SocketMSGUtil.java:178)
at com.xxxx.cop.communication.SocketMSGUtil.run(SocketMSGUtil.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)