It seems that there is a bug in the jTDS driver within Confluence, related to SSL connections to SQL Server, see here:
http://sourceforge.net/p/jtds/bugs/725/
Similar bug report for JIRA: https://jira.atlassian.com/browse/JRA-39866
Problem
Confluence attempting to connect to SQL Server over SSL results in Network error IOException: Connection reset.
If upgrading from a version of Confluence using Java 1.7, Confluence will not start up after the upgrade and the following appears in atlassian-confluence.log:
2015-11-24 16:14:38,738 WARN [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] [mchange.v2.resourcepool.BasicResourcePool] run com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@6478f87d -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: Network error IOException: Connection reset
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:385)
at net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:182)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:209)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at net.sourceforge.jtds.ssl.TdsTlsInputStream.readFully(TdsTlsInputStream.java:131)
at net.sourceforge.jtds.ssl.TdsTlsInputStream.primeBuffer(TdsTlsInputStream.java:100)
at net.sourceforge.jtds.ssl.TdsTlsInputStream.read(TdsTlsInputStream.java:78)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
at sun.security.ssl.InputRecord.read(InputRecord.java:503)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
at net.sourceforge.jtds.ssl.SocketFactories$TdsTlsSocketFactory.createSocket(SocketFactories.java:102)
at net.sourceforge.jtds.jdbc.SharedSocket.enableEncryption(SharedSocket.java:336)
at net.sourceforge.jtds.jdbc.TdsCore.negotiateSSL(TdsCore.java:547)
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:338)
... 10 more
2015-11-24 16:14:38,743 WARN [localhost-startStop-1] [sf.hibernate.cfg.SettingsFactory] buildSettings Could not obtain connection metadata
java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:529)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
at net.sf.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:84)
at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1191)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:822)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:540)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:474)
at
Environment
- Java 1.8
- SSL connection specified in db connection string: ";ssl=true"
- Confluence is using jtds driver
Steps to Reproduce
- Install Confluence 5.8.17 using the embedded JRE (1.8)
- Use the default jtds driver installed with Confluence
- Attempt to connect to a database with a secure connection - adding ;ssl=true to the database connection string.
Workaround
Bug
Medium
This issue has been resolved in later versions of Confluence.