Question

尝试启动使用embedded h2.db文件的应用时，我的tomcat日志中出现以下错误：

Caused by: org.h2.jdbc.JdbcSQLException: The database is read only**; SQL statement:<br>
UPDATE DATABASECHANGELOGLOCK SET LOCKED = TRUE, LOCKEDBY = '192.168.122.1 (192.168.122.1)', LOCKGRANTED = '2017-10-19 17:06:08.499' WHERE ID = 1 AND LOCKED = FALSE [90097-175]<br>
        at org.h2.message.DbException.getJdbcSQLException(DbException.java:332)
        at org.h2.message.DbException.get(DbException.java:172)
        at org.h2.message.DbException.get(DbException.java:149)
        at org.h2.message.DbException.get(DbException.java:138)
        at org.h2.engine.Database.checkWritingAllowed(Database.java:1784)
        at org.h2.table.Table.checkWritingAllowed(Table.java:1082)
        at org.h2.engine.User.hasRight(User.java:114)
        at org.h2.engine.User.checkRight(User.java:100)
        at org.h2.command.dml.Update.update(Update.java:87)

正如您所看到的，它无法运行update语句来锁定数据库。

进行问题排查：
1.我打开一个h2 shell运行并直接连接到h2 db：

sudo java -cp h2.jar org.h2.tools.Shell -url "jdbc:h2:file:/usr/share/tomcat/ellucianmobile/banner-mobileserver/banner-mobileserver-prodD" -driver "org.h2.Driver" -user "sa" -password ""

然后我列出了表格：

sql> SHOW TABLES; 
TABLE_NAME | TABLE_SCHEMA  
BUILDING_DOMAIN | PUBLIC 
CALENDAR | PUBLIC 
CAMPUS_DOMAIN | PUBLIC  
CATEGORY | PUBLIC 
CONFIGURATION_DOMAIN | PUBLIC 
DATABASECHANGELOG | PUBLIC 
DATABASECHANGELOGLOCK | PUBLIC 
ENTRY_CACHE | PUBLIC 
ENTRY_CACHE_LINK | PUBLIC  
ENTRY_DOMAIN | PUBLIC 
EVENT | PUBLIC 
EVENT_CATEGORIES | PUBLIC  
FEED_CACHE | PUBLIC 
FEED_CACHE_LINK | PUBLIC  
MS_DEVICE | PUBLIC 
MS_DEVICEUSER | PUBLIC 
MS_NMESSAGE | PUBLIC 
MS_NOTIFICATION | PUBLIC 
MS_NOT_DEL_REC_DOMAIN | PUBLIC  
MS_NSTATUS | PUBLIC 
MS_RECIPIENT | PUBLIC 
MS_RECIPIENT_STATUSES | PUBLIC  
NOTIFICATION_DELIVERY_DOMAIN | PUBLIC  
NUMBERS_DOMAIN | PUBLIC 
REGISTRATION_CART | PUBLIC 
SYSTEM_DATA_DOMAIN | PUBLIC 
(26 rows, 28 ms)

我可以从给定的表中选择行：
（如下所示，锁定设置为FALSE）

sql> SELECT * FROM DATABASECHANGELOGLOCK;
ID | LOCKED | LOCKGRANTED | LOCKEDBY 
1 | FALSE | null | null
(1 row, 1 ms)

由于阅读工作，我试着写信给DB：

sql> UPDATE DATABASECHANGELOGLOCK SET LOCKED=FALSE, LOCKGRANTED=null, LOCKEDBY=null where ID=1; 

Error: org.h2.jdbc.JdbcSQLException: The database is read only;

尝试运行UPDATE以获取锁定时，tomcat获得的错误。

默认情况下，我可以做些什么来使h2 db可用于读写？

Answer 1

在运行Tomcat作为服务的Windows服务器上，我遇到了同样的问题。默认情况下，它以LOCAL_SERVICE帐户运行，该帐户没有对db文件夹的写权限。您可以通过为LOCAL_SERVICE帐户的db文件夹授予修改权限，或将服务帐户更改为LOCAL_SYSTEM来解决此问题。

Answer 2

添加它对我有用

@Configuration
@EnableJpaRepositories
@EnableTransactionManagement
class ApplicationConfig {
}

Tomcat错误：嵌入式H2 DB只读

2 个答案: