H2 database not flushed because of file lock
I am running a Spring-Boot project in IDEA Intelli for training that writes a recipe to the database using REST-full services. The IDE runs the server and I use Postman to query.
My problem is that the H2 database does not persist the data entered. In memory it's fine, but as soon as I shutdown and start up again, the data is gone.
Looking at the database file, I see a trace file that seems to show that the DB wasn't updated because there was a lock on it. I have searched for a lock file (locate *.lock.db), stopped all Java processes, and even rebooted without a change in behavior. I've changed the FILE_LOCK options for H2 but the problem persists.
EDIT: I just noticed that I hadn't tried FILE_LOCK=FILE. I just tried it and the db isn't updated. However, a trace file is not produced.
EDIT 2: I forgot to say that I'm running on Ubuntu 20.04.
EDIT 3: I am being careful to shutdown using the "actuator/shutdown" from Postman. Using file locking, I do this:
- start the server running from my IDE. I can see the lock file being created
- create a new recipe
- make sure I can get it (returns the recipe, no error)
- shutdown using the actuator. The lock file is removed.
- startup the server again. New lock file.
- try to get the recipe. Returns a 404 error. No trace file.
What could be causing this? Here is my trace.db file [note: when I use FILE_LOCK=FILE, no trace file is created, so maybe the locking problem was a red herring?]:
2021-09-09 07:54:08 database: flush
org.h2.message.DbException: General error: "java.lang.IllegalStateException: The file is locked: nio:/home/knute/IdeaProjects/recipes_db.mv.db [1.4.200/7]" [50000-200]
at org.h2.message.DbException.get(DbException.java:194)
at org.h2.message.DbException.convert(DbException.java:347)
at org.h2.mvstore.db.MVTableEngine$1.uncaughtException(MVTableEngine.java:93)
at org.h2.mvstore.MVStore.handleException(MVStore.java:2877)
at org.h2.mvstore.MVStore.panic(MVStore.java:481)
at org.h2.mvstore.MVStore.(MVStore.java:402)
at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579)
at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170)
at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103)
at org.h2.engine.Database.getPageStore(Database.java:2659)
at org.h2.engine.Database.open(Database.java:675)
at org.h2.engine.Database.openDatabase(Database.java:307)
at org.h2.engine.Database.(Database.java:301)
at org.h2.engine.Engine.openSession(Engine.java:74)
at org.h2.engine.Engine.openSession(Engine.java:192)
at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171)
at org.h2.engine.Engine.createSession(Engine.java:166)
at org.h2.engine.Engine.createSession(Engine.java:29)
at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340)
at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:173)
at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:152)
at org.h2.Driver.connect(Driver.java:69)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)
at com.zaxxer.hikari.pool.HikariPool.access$100(HikariPool.java:71)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:725)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:711)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.h2.jdbc.JdbcSQLNonTransientException: General error: "java.lang.IllegalStateException: The file is locked: nio:/home/knute/IdeaProjects/recipes_db.mv.db [1.4.200/7]" [50000-200]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:505)
at org.h2.message.DbException.getJdbcSQLException(DbException.java:429)
... 33 more
Caused by: java.lang.IllegalStateException: The file is locked: nio:/home/knute/IdeaProjects/recipes_db.mv.db [1.4.200/7]
at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950)
at org.h2.mvstore.FileStore.open(FileStore.java:166)
at org.h2.mvstore.MVStore.(MVStore.java:381)
... 27 more
Caused by: java.nio.channels.OverlappingFileLockException
at java.base/sun.nio.ch.FileLockTable.checkList(FileLockTable.java:229)
at java.base/sun.nio.ch.FileLockTable.add(FileLockTable.java:123)
at java.base/sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1154)
at org.h2.store.fs.FileNio.tryLock(FilePathNio.java:121)
at java.base/java.nio.channels.FileChannel.tryLock(FileChannel.java:1165)
at org.h2.mvstore.FileStore.open(FileStore.java:163)
... 28 more
2021-09-09 07:54:08 database: flush
org.h2.message.DbException: General error: "java.lang.IllegalStateException: The file is locked: nio:/home/knute/IdeaProjects/recipes_db.mv.db [1.4.200/7]" [50000-200]
at org.h2.message.DbException.get(DbException.java:194)
at org.h2.message.DbException.convert(DbException.java:347)
at org.h2.mvstore.db.MVTableEngine$1.uncaughtException(MVTableEngine.java:93)
at org.h2.mvstore.MVStore.handleException(MVStore.java:2877)
at org.h2.mvstore.MVStore.panic(MVStore.java:481)
at org.h2.mvstore.MVStore.(MVStore.java:402)
at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579)
at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170)
at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103)
at org.h2.engine.Database.getPageStore(Database.java:2659)
at org.h2.engine.Database.open(Database.java:675)
at org.h2.engine.Database.openDatabase(Database.java:307)
at org.h2.engine.Database.(Database.java:301)
at org.h2.engine.Engine.openSession(Engine.java:74)
at org.h2.engine.Engine.openSession(Engine.java:192)
at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171)
at org.h2.engine.Engine.createSession(Engine.java:166)
at org.h2.engine.Engine.createSession(Engine.java:29)
at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340)
at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:173)
at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:152)
at org.h2.Driver.connect(Driver.java:69)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)
at com.zaxxer.hikari.pool.HikariPool.access$100(HikariPool.java:71)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:725)
at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:711)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.h2.jdbc.JdbcSQLNonTransientException: General error: "java.lang.IllegalStateException: The file is locked: nio:/home/knute/IdeaProjects/recipes_db.mv.db [1.4.200/7]" [50000-200]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:505)
at org.h2.message.DbException.getJdbcSQLException(DbException.java:429)
... 33 more
Caused by: java.lang.IllegalStateException: The file is locked: nio:/home/knute/IdeaProjects/recipes_db.mv.db [1.4.200/7]
at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950)
at org.h2.mvstore.FileStore.open(FileStore.java:166)
at org.h2.mvstore.MVStore.(MVStore.java:381)
... 27 more
Caused by: java.nio.channels.OverlappingFileLockException
at java.base/sun.nio.ch.FileLockTable.checkList(FileLockTable.java:229)
at java.base/sun.nio.ch.FileLockTable.add(FileLockTable.java:123)
at java.base/sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1154)
at org.h2.store.fs.FileNio.tryLock(FilePathNio.java:121)
at java.base/java.nio.channels.FileChannel.tryLock(FileChannel.java:1165)
at org.h2.mvstore.FileStore.open(FileStore.java:163)
... 28 more
...and the application.properties file [note: in my current iteration, I am using FILE_LOCK=FILE]:
# Required by HyperSkill
server.port=8881
management.endpoints.web.exposure.include=*
management.endpoint.shutdown.enabled=true
spring.datasource.url=jdbc:h2:file:../recipes_db
# Solves file locking problem? No.
#spring.datasource.url=jdbc:h2:file:../recipes_db;DB_CLOSE_ON_EXIT=TRUE;FILE_LOCK=NO
#spring.datasource.url=jdbc:h2:file:../recipes_db;FILE_LOCK=NO
#spring.datasource.url=jdbc:h2:file:../recipes_db;FILE_LOCK=SOCKET
#spring.datasource.url=jdbc:h2:file:../recipes_db;FILE_LOCK=FS
# Needed?
spring.datasource.auto-commit=true
# To remove warning
spring.jpa.open-in-view=true