Java. SQL. sqlexception: Lock wait timeout exceeded | solution to cannotacquirelockexception

Java. SQL. sqlexception: Lock wait timeout exceeded | org. springframework. Dao. cannotacquirelockexception solution in spring Development notes

Go directlyBug details:

2012-03-12 15:20:31 XmlBeanDefinitionReader [INFO] Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]2012-03-12 15:20:31 SQLErrorCodesFactory [INFO] SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]2012-03-12 15:20:31 ExceptionUtil [ERROR] SqlMapClient operation; SQL [];   --- The error occurred in com/defonds/syncpath/dao/operation.xml.  --- The error occurred while applying a parameter map.  --- Check the operation.updateShareStatus-InlineParameterMap.  --- Check the statement (update failed).  --- Cause: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   --- The error occurred in com/defonds/syncpath/dao/operation.xml.  --- The error occurred while applying a parameter map.  --- Check the operation.updateShareStatus-InlineParameterMap.  --- Check the statement (update failed).  --- Cause: java.sql.SQLException: Lock wait timeout exceeded; try restarting transactionorg.springframework.dao.CannotAcquireLockException: SqlMapClient operation; SQL [];   --- The error occurred in com/defonds/syncpath/dao/operation.xml.  --- The error occurred while applying a parameter map.  --- Check the operation.updateShareStatus-InlineParameterMap.  --- Check the statement (update failed).  --- Cause: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   --- The error occurred in com/defonds/syncpath/dao/operation.xml.  --- The error occurred while applying a parameter map.  --- Check the operation.updateShareStatus-InlineParameterMap.  --- Check the statement (update failed).  --- Cause: java.sql.SQLException: Lock wait timeout exceeded; try restarting transactionat org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:244)at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:212)at com.defonds.frameworkcommons.dao.BaseDaoImpl.execute(BaseDaoImpl.java:31)at com.defonds.frameworkcommons.dao.BaseDaoImpl.update(BaseDaoImpl.java:97)at com.defonds.syncpath.service.operation.impl.OperationServiceImpl.revokeSharedFolder(OperationServiceImpl.java:287)at com.defonds.syncpath.service.share.impl.ShareServiceImpl.handleRevokeSharedFolder(ShareServiceImpl.java:312)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at com.defonds.interfaceframework.controller.Action.invokeMethod(Action.java:256)at com.defonds.interfaceframework.controller.Action.execute(Action.java:206)at com.defonds.interfaceframework.controller.DispatcherServlet.service(DispatcherServlet.java:144)at com.defonds.syncpath.common.ArcSyncDispatcherServlet.service(ArcSyncDispatcherServlet.java:51)at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)at java.lang.Thread.run(Thread.java:619)

Cause Analysis:

Nested spring transactions cause deadlocks. Operationservice is embedded in fileserviceimpl:

private OperationService operationService;

In the delete method of fileserviceimpl, operations are performed on MySQL file tables, while the revokesharedfolder method in operationservice also performs update operations on the same table. Transaction nesting causes deadlocks.

Solution:

The method for calling the transaction is set to propagation. supports:

@Transactional(propagation=Propagation.SUPPORTS)//by Defonds,for BUG094537@Overridepublic void delete(int uid, int[] itemIds) {if (itemIds != null && itemIds.length > 0) {