https://github.com/bwaldvogel/h2-lob-issue

Reproducible unit test for the H2 1.4 "Lob not found" issue
https://github.com/bwaldvogel/h2-lob-issue

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Reproducible unit test for the H2 1.4 "Lob not found" issue

• Host: GitHub
• URL: https://github.com/bwaldvogel/h2-lob-issue
• Owner: bwaldvogel
• Created: 2014-11-18T21:43:21.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2014-12-15T18:58:38.000Z (almost 10 years ago)
• Last Synced: 2024-05-30T01:06:15.945Z (4 months ago)
• Language: Java
• Homepage:
• Size: 273 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# H2 1.4 "Lob not found" Issue - Fixed in 1.4.183! #

Reproducible failing unit test for the [H2 1.4 "Lob not found" issue][google-groups].

## Howto ##

Prerequisites:

  - Java 8

On Linux:

```

# ./gradlew --info build

```

On Windows:

```

# gradlew --info build

```

### The stacktrace ###

The `H2LobIssueTest.testConcurrentLobModification` fails due to the `Lob not found` exception in H2.

On Travis: [![Build Status](https://travis-ci.org/bwaldvogel/h2-lob-issue.png?branch=master)](https://travis-ci.org/bwaldvogel/h2-lob-issue)

```

Caused by:

org.hibernate.exception.GenericJDBCException: could not load an entity: [de.bwaldvogel.LobEntity#1]

	at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)

	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)

	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)

	at org.hibernate.loader.Loader.loadEntity(Loader.java:1937)

	at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:86)

	at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:76)

	at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3270)

	at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496)

	at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477)

	at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227)

	at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:285)

	at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152)

	at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1080)

	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:997)

	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:990)

	at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:610)

	... 13 more

	Caused by:

	org.h2.jdbc.JdbcSQLException: General error: "java.lang.RuntimeException: Lob not found: 25" [50000-182]

		at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)

		at org.h2.message.DbException.get(DbException.java:168)

		at org.h2.message.DbException.convert(DbException.java:295)

		at org.h2.message.DbException.toSQLException(DbException.java:268)

		at org.h2.message.TraceObject.logAndConvert(TraceObject.java:352)

		at org.h2.jdbc.JdbcBlob.getBytes(JdbcBlob.java:101)

		at org.hibernate.type.SerializableToBlobType.get(SerializableToBlobType.java:82)

		at org.hibernate.type.AbstractLobType.nullSafeGet(AbstractLobType.java:68)

		at org.hibernate.type.AbstractType.hydrate(AbstractType.java:105)

		at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2267)

		at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1423)

		at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1351)

		at org.hibernate.loader.Loader.getRow(Loader.java:1251)

		at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:619)

		at org.hibernate.loader.Loader.doQuery(Loader.java:745)

		at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:270)

		at org.hibernate.loader.Loader.loadEntity(Loader.java:1933)

		... 25 more

		Caused by:

		java.lang.RuntimeException: Lob not found: 25

			at org.h2.message.DbException.throwInternalError(DbException.java:242)

			at org.h2.store.LobStorageMap.getInputStream(LobStorageMap.java:236)

			at org.h2.value.ValueLobDb.getInputStream(ValueLobDb.java:392)

			at org.h2.jdbc.JdbcBlob.getBytes(JdbcBlob.java:92)

			... 36 more

```

### What is the test doing? ###

The unit test (`H2LobIssueTest`) does the following a couple of times in multiple threads:

  - Load the entity with a BLOB

  - Append data to the BLOB

  - Write changes back to the database

### H2 configuration ###

The H2 database is configured in `TestConfig.dataSource` with the following JDBC URL: `jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=false`.

[google-groups]: https://groups.google.com/forum/#!topic/h2-database/t0Bg5paQZ1U