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sql:"select id,stno,sname,ic_no from student where id in (select studentid from groupstu where groupid=11876)

java.sql.SQLException: null: Got error 124 from storage engine
at org.gjt.mm.mysql.MysqlIO.nextRow(MysqlIO.java:786)
at org.gjt.mm.mysql.MysqlIO.getResultSet(MysqlIO.java:743)
at org.gjt.mm.mysql.MysqlIO.sqlQueryDirect(MysqlIO.java:599)
at org.gjt.mm.mysql.MysqlIO.sqlQuery(MysqlIO.java:635)
at org.gjt.mm.mysql.Connection.execSQL(Connection.java:882)
at org.gjt.mm.mysql.Connection.execSQL(Connection.java:815)
at org.gjt.mm.mysql.Statement.executeQuery(Statement.java:169)
at org.gjt.mm.mysql.jdbc2.Statement.executeQuery(Statement.java:78)
at qt.utils.DBCP.PooledStatement.executeQuery(PooledStatement.java:114)
at eduservlet.DBControl.SelectDB(DBControl.java:94)
at admin.webwritecard.WebCardServlet.doPost(WebCardServlet.java:122)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:165)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
at com.caucho.server.http.Invocation.service(Invocation.java:311)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:221)
at com.caucho.server.http.HttpRequest.handleConnection(HttpReque