如果WebSphere使用数据源连接数据库尤其是oracle的时候出现错误:
连接池管理器无法分配一个受管连接:javax.resource.spi.ResourceAllocationException: DSRA0080E: An exception was received by the Data Store Adapter. See original exception message: 仅 READ_COMMITTED 和 SERIALIZABLE 是有效的事务处理级.
这时候应该修改目录:
WebSphere\AppServer\config\cells\yc-server\applications\ycportal.ear\deployments\ycportal\ycportal.war\WEB-INF下的文件:ibm-web-ext.xmi
找到 将其修改为:< resourceRefExtensions xmi:id="ResourceRefExtension_1" isolationLevel="TRANSACTION_SERIALIZABLE">
然后重启应用就可以了