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

问题描述

如果我对我的网络应用程序运行多个线程，我会得到:

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)

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.那么为什么我会收到此错误消息?

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 ?

顺便说一句:我的连接池如下所示:

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>

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

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

问候罗杰

推荐答案

经过一番谷歌搜索后，我发现在连接到 SQLite 时使用多个连接是一种不好的做法.见

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 锁定

将 poolsize maxactive 设置为 1 并尝试.

Set your poolsize maxactive to 1 and try out.

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