使用select语句锁定[SQLITE_BUSY]数据库文件 [英] Getting [SQLITE_BUSY] database file is locked with select statements

问题描述

  java.sql.SQLException：[SQLITE_BUSY]数据库文件被锁定（数据库被锁定）
在org.sqlite.DB.newSQLException（DB.java:383）
在org.sqlite.DB.newSQLException（DB.java:387）
在org.sqlite.DB.execute（DB.java:339）
在org.sqlite.PrepStmt.executeQuery（PrepStmt.java:75）
在org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery （DelegatingPreparedStatement.java:96）
  

我知道只有一个线程可以写入sqlite数据库，但我只是从数据库中读取数据。那么，为什么我会得到这个错误信息？

顺便说一句：我的连接池看起来像这样：

 < bean class =org.apache.commons.dbcp.BasicDataSource
 destroy-method =closeid =dataSource> 
< property name =driverClassNamevalue =$ {database.driverClassName}/> 
< property name =urlvalue =$ {database.url}/> 
< property name =usernamevalue =$ {database.username}/> 
< property name =passwordvalue =$ {database.password}/> 
< property name =initialSizevalue =1/> 
< property name =maxActivevalue =2/> 
< property name =maxIdlevalue =1/> 
< property name =poolPreparedStatementsvalue =true/> 
< / bean> 
  

设置为：Java 1.6，Tomcat 7.0.34，Spring 3.2，Hibernate 3.6.9和sqlite3 3.7.2

问候
罗杰

解决方案

After一些谷歌搜索，我发现连接到SQLite时使用多个连接是不好的做法。见

http：/ /touchlabblog.tumblr.com/post/24474398246/android-sqlite-locking

将您的poolize maxactive设置为1并尝试。

If I run multiple threads against my web app I get:

java.sql.SQLException: [SQLITE_BUSY]  The database file is locked (database is locked)
    at org.sqlite.DB.newSQLException(DB.java:383)
    at org.sqlite.DB.newSQLException(DB.java:387)
    at org.sqlite.DB.execute(DB.java:339)
    at org.sqlite.PrepStmt.executeQuery(PrepStmt.java:75)
    at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)

I do know that only one thread can write to a sqlite database but I'm only reading from the database. So why do I get this error message ?

BTW: My connection pool looks like this:

<bean class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close" id="dataSource">
    <property name="driverClassName" value="${database.driverClassName}" />
    <property name="url" value="${database.url}" />
    <property name="username" value="${database.username}" />
    <property name="password" value="${database.password}" />
    <property name="initialSize" value="1" />
    <property name="maxActive" value="2" />
    <property name="maxIdle" value="1" />
    <property name="poolPreparedStatements" value="true" />
</bean>

The setup is: Java 1.6, Tomcat 7.0.34, Spring 3.2, Hibernate 3.6.9 and sqlite3 3.7.2

Regards Roger

解决方案

After some googling I found that it is a bad practice to use multiple connections when connecting to SQLite. See

http://touchlabblog.tumblr.com/post/24474398246/android-sqlite-locking

Set your poolsize maxactive to 1 and try out.

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