Upgrade to version 6.1.x Failed With Error "ORA-01000: maximum open cursors exceeded"

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問題

When upgrading from Confluence 6.0 (or earlier), to Confluence 6.1.x (or later), the upgrade fails with the message   ORA-01000: maximum open cursors exceeded.

The following appears in the atlassian-confluence.log

ERROR [localhost-startStop-1] [atlassian.confluence.plugin.PluginFrameworkContextListener] launchUpgrades Upgrade failed, application will not start: com.atlassian.config.ConfigurationException: Cannot update schema
com.atlassian.confluence.upgrade.UpgradeException: com.atlassian.config.ConfigurationException: Cannot update schema
	at com.atlassian.confluence.upgrade.AbstractUpgradeManager.upgrade(AbstractUpgradeManager.java:133)
	at com.atlassian.confluence.plugin.PluginFrameworkContextListener.launchUpgrades(PluginFrameworkContextListener.java:118)
	at com.atlassian.confluence.plugin.PluginFrameworkContextListener.contextInitialized(PluginFrameworkContextListener.java:77)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.atlassian.config.ConfigurationException: Cannot update schema
	at bucket.core.persistence.hibernate.schema.SchemaHelper.validateSchemaUpdateIfNeeded(SchemaHelper.java:174)
	at com.atlassian.confluence.upgrade.AbstractUpgradeManager.upgrade(AbstractUpgradeManager.java:119)
	... 11 more
Caused by: org.hibernate.exception.GenericJDBCException: Error accessing table metadata
	at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
	at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.convertSQLException(InformationExtractorJdbcDatabaseMetaDataImpl.java:97)
	at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.locateTableInNamespace(InformationExtractorJdbcDatabaseMetaDataImpl.java:352)
	at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.getTable(InformationExtractorJdbcDatabaseMetaDataImpl.java:226)
	at org.hibernate.tool.schema.internal.exec.ImprovedDatabaseInformationImpl.getTableInformation(ImprovedDatabaseInformationImpl.java:110)
	at org.hibernate.tool.schema.internal.exec.ImprovedDatabaseInformationImpl.locateTableInformation(ImprovedDatabaseInformationImpl.java:142)
	at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.getForeignKeys(InformationExtractorJdbcDatabaseMetaDataImpl.java:655)
	at org.hibernate.tool.schema.extract.internal.TableInformationImpl.foreignKeys(TableInformationImpl.java:88)
	at org.hibernate.tool.schema.extract.internal.TableInformationImpl.getForeignKey(TableInformationImpl.java:99)
	at org.hibernate.tool.schema.internal.SchemaMigratorImpl.findMatchingForeignKey(SchemaMigratorImpl.java:529)
	at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applyForeignKeys(SchemaMigratorImpl.java:505)
	at org.hibernate.tool.schema.internal.SchemaMigratorImpl.performMigration(SchemaMigratorImpl.java:314)
	at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:136)
	at com.atlassian.confluence.impl.hibernate.ConfluenceHibernateSchemaManagementTool$3.doMigration(ConfluenceHibernateSchemaManagementTool.java:105)
	at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:109)
	at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:87)
	at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:58)
	at bucket.core.persistence.hibernate.schema.SchemaHelper.validateSchemaUpdateIfNeeded(SchemaHelper.java:171)
	... 12 more
Caused by: java.sql.SQLException: ORA-01000: maximum open cursors exceeded

	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399)
	at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059)
	at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522)
	at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257)

診断

環境

  • Oracle JDBC Driver 12.1.0.2 
  • Oracle Database

診断ステップ

Running the following query in the database reveals that Confluence is taking up ~600 open cursors during the upgrade:

select a.value, s.username, s.sid, s.serial#
from v$sesstat a, v$statname b, v$session s
where a.statistic# = b.statistic#  and s.sid=a.sid
   and b.name = 'opened cursors current'
   and USERNAME='<INSERT-DATABASE-USERNAME-HERE>'

原因

CONFSERVER-52353 - 課題詳細を取得中... ステータス

This is a known bug with Oracle JDBC driver version 12.1.0.2, which leaks database cursors. See this Oracle Community forum post for more information: https://community.oracle.com/thread/3682300

回避策

Increase Maximum Open Cursors

Increase the maximum open cursor in the database by executing the following SQL command on the database: 

ALTER SYSTEM SET open_cursors = 1000 SCOPE=BOTH;

This example sets the maximum open cursors to 1000. Change this value as required. 

ソリューション

Update the Oracle JDBC Driver to the latest version (12.2.0.1)

There is a new version of the Oracle JDBC driver which fixes the cursor leak. Updating your driver prior to upgrading Confluence to 6.1.x will prevent this issue.

To update the driver:

  1. Stop Confluence, and create a backup of the installation and home directory.
  2. Download version 12.2.0.1 (or later) of the driver from the Oracle JDBC Driver page.
  3. Replace the existing ojdbc7.jar in <Confluence installation>/confluence/WEB-INF/lib with the new driver. For detailed instructions, follow step 6 in the database setup for oracle page.
  4. Confluence を起動します。
  5. Re-attempt upgrade.

 

最終更新日 2017 年 7 月 3 日

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