如何处理java.lang.AbstractMethodError:com.mysql.jdbc.JDBC4CallableStatement.closeOnCompletion()
我将mysql-connector-java-5.1.20-bin.jar与jdk7和tomcat7一起使用,但我的代码在执行callableStatement.closeOnCompletion()时给出了abstractMethodError。代码如下所示: 试一试{ 完全例外的是:如何处理java.lang.AbstractMethodError:com.mysql.jdbc.JDBC4CallableStatement.closeOnCompletion(),java,Java,我将mysql-connector-java-5.1.20-bin.jar与jdk7和tomcat7一起使用,但我的代码在执行callableStatement.closeOnCompletion()时给出了abstractMethodError。代码如下所示: 试一试{ 完全例外的是: java.lang.AbstractMethodError: com.mysql.jdbc.JDBC4CallableStatement.closeOnCompletion()V at com.clearcub
java.lang.AbstractMethodError: com.mysql.jdbc.JDBC4CallableStatement.closeOnCompletion()V
at com.clearcube.util.DMLLayer.getOfflineNodes(DMLLayer.java:90)
at com.clearcube.logging.ShutBladeAlertService.<init>(ShutBladeAlertService.java:80)
at com.clearcube.common.CMSServiceLoaderServlet.init(CMSServiceLoaderServlet.java:95)
at javax.servlet.GenericServlet.init(GenericServlet.java:160)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5015)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
提前感谢。closeOnCompletion()
自Java 7以来就存在了。并且该驱动程序已使用该接口的早期版本实现。因此,MySQL驱动程序未实现此方法
查找是否存在支持此方法的较新版本(但似乎不存在),或避免调用此方法。5.1.20是我正在使用的最新驱动程序。我需要调用此方法,因为我正在其他代码处理中使用此函数返回的resultSet。在检查打开的resultSet数后,是否有其他方法关闭callableStatement。在此方法存在之前,每个人都可以使用JDBC,因此您应该可以。调用所有其他处理,完成后关闭该语句。我在获取resultSet后不会关闭该语句。当我处理resultSet并显示以下异常时,该语句会自动关闭;java.sql.SQLException:resultSet关闭后不允许操作16:48:15184错误:com.mysql。jdbc.SQLError.createSQLException(SQLError.java:910)在com.mysql.jdbc.ResultSet.checkClosed(ResultSet.java:641)处出现16:48:15184错误在com.mysql.jdbc.ResultSet.next(ResultSet.java:6437)处我已经编辑了我的问题,并在使用返回的结果集的地方添加了代码。请也看到这一点并给我任何解决方案,请。。。
java.lang.AbstractMethodError: com.mysql.jdbc.JDBC4CallableStatement.closeOnCompletion()V
at com.clearcube.util.DMLLayer.getOfflineNodes(DMLLayer.java:90)
at com.clearcube.logging.ShutBladeAlertService.<init>(ShutBladeAlertService.java:80)
at com.clearcube.common.CMSServiceLoaderServlet.init(CMSServiceLoaderServlet.java:95)
at javax.servlet.GenericServlet.init(GenericServlet.java:160)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5015)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
timer.scheduleAtFixedRate(new TimerTask() {
public void run()
{
String bladeMacs = "";
String vmMacs = "";
try
{
int poll = Integer.parseInt(
ServerConfigurationService.getProperty("blade.refresh.time"));
Calendar callendar = Calendar.getInstance();
String strblade = "";
String strvm = "";
String Ip = "";
ResultSet BladeRs = (ResultSet)DMLLayer.getOfflineNodes(
"Blade", poll, 1);
if (BladeRs != null) {
boolean isBladeAlive = false;
int x = 0;
try {
while (BladeRs.next()) {
String mac = BladeRs.getString("macAddress");
String ip = BladeRs.getString("Ip");
isBladeAlive =
EchoUDPClientDiscoveryObjectResponse.echo(InetAddress.getByName(BladeRs
.getString("Ip")), 6502, "any",
3, 500);
if (!isBladeAlive) {
if (x > 0)
{
strblade = strblade + "\n";
bladeMacs = bladeMacs + "\n";
}
strblade = strblade + ip;
x = 2;
bladeMacs = bladeMacs + mac;
}
else
{
String query = "update DiscoveredNode set DateModified=:DateModified where MacAddress=:MacAddress";
ShutBladeAlertService.objTypeVector.removeAllElements();
ShutBladeAlertService.objFieldVector.removeAllElements();
ShutBladeAlertService.objValueVector.removeAllElements();
ShutBladeAlertService.objTypeVector.add("Long");
ShutBladeAlertService.objFieldVector.add("DateModified");
ShutBladeAlertService.objValueVector.add(
Long.valueOf(System.currentTimeMillis()));
ShutBladeAlertService.objTypeVector.add("String");
ShutBladeAlertService.objFieldVector.add("MacAddress");
ShutBladeAlertService.objValueVector.add(mac);
DMLLayer.runUpdateQuery(query,
ShutBladeAlertService.objFieldVector, ShutBladeAlertService.objValueVector,
ShutBladeAlertService.objTypeVector);
}
}
BladeRs.close();
}
catch (Exception ex1) {
ex1.printStackTrace();
}
}
}
}