Question

我正在尝试使用orientdb。样本非常简单：

package models;

import java.util.List;

import com.orientechnologies.orient.core.db.object.ODatabaseObjectPool;
import com.orientechnologies.orient.core.db.object.ODatabaseObjectTx;
import com.orientechnologies.orient.core.sql.query.OSQLSynchQuery;

public class User {

    public String name;

    public static void main(String[] args) {
        String uri = "local:c:\\orientdb";

        ODatabaseObjectTx db = ODatabaseObjectPool.global().acquire(uri, "admin", "admin");
        db.getEntityManager().registerEntityClass(User.class);

        User user = new User();
        user.name = "aaa";
        db.save(user);

        List<?> list = db.query(new OSQLSynchQuery<Long>("select count(*) from User"));
        System.out.println(list);
        db.commit();
        db.close(); // ****** throws exception
    }
}

但最后一行db.close()将抛出异常：

Exception in thread "main" com.orientechnologies.common.concur.lock.OLockException: Can't release a database URL not acquired before. URL: c:\orientdb
    at com.orientechnologies.orient.core.db.ODatabasePoolAbstract.release(ODatabasePoolAbstract.java:81)
    at com.orientechnologies.orient.core.db.ODatabasePoolBase.release(ODatabasePoolBase.java:43)
    at com.orientechnologies.orient.core.db.object.ODatabaseObjectTxPooled.close(ODatabaseObjectTxPooled.java:81)
    at models.User.main(User.java:26)

哪里错了？

Answer 1

最后，我发现它是Orientdb的一个bug。它无法正确处理Windows路径，也无法提供良好的错误消息。

如果我使用local:c:/orientdb而不是local:c:\orientdb，一切都很好。

我已向orientdb团队报告此事。

关闭连接时为什么会抛出异常？

1 个答案: