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PODB connection issue between H2 database 1.3.156 (or prior) and 1.3.157 (and onwards)
 

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  1. PODB connection issue between H2 database 1.3.156 (or prior) and 1.3.157 (and onwards)
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    <p>As a part of recent migration to latest H2 database jar in my project, I came across a connection issue.</p> <p>The way it works in our project is that one program starts H2 database in server mode and connects to the database. Another program in the same JVM uses the URL <em>"jdbc:h2:tcp://localhost/myfolder/mydb;IGNORECASE=TRUE"</em> and tries creating a connection using java.sql.DriverManager to same database i.e. <em>Connection conn = DriverManager.getConnection(this.url, this.user, this.password);</em></p> <p>But the connection object is not getting created after I migrate to latest H2 jar (Earlier we were using 1.2.147 and it was working fine there). After some analysis, I could narrow down on the fact that if I use H2 version 1.3.156 or below, this code works fine but if I start using H2 version 1.3.157 or above, the connection is not created for the second program. I checked the changelog for both these versions (<a href="http://www.softpedia.com/progChangelog/H2-Database-Engine-Changelog-30870.html" rel="nofollow">http://www.softpedia.com/progChangelog/H2-Database-Engine-Changelog-30870.html</a>) but I could not find anything that might throw some light on this. Note that our H2 database does not contain any table with BLOB/CLOB column.</p> <p>What could be the reason for the same?</p> <p>Regards, Aditya</p> <p><strong>P.S.: Exception stacktrace:</strong></p> <pre><code>org.h2.jdbc.JdbcSQLException: Connection is broken: "java.net.ConnectException: Connection refused: connect: localhost" [90067-174] at org.h2.message.DbException.getJdbcSQLException(DbException.java:332) at org.h2.message.DbException.get(DbException.java:161) at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:417) at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.jav a:305) at org.h2.jdbc.JdbcConnection.&lt;init&gt;(JdbcConnection.java:105) at org.h2.jdbc.JdbcConnection.&lt;init&gt;(JdbcConnection.java:90) at org.h2.Driver.connect(Driver.java:73) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at com.avaya.induna.server.db.DBConnectionManagerImpl.getConnection(DBCo nnectionManagerImpl.java:34) at com.avaya.induna.server.db.backup.BackupImplThread.takeBackup(BackupI mplThread.java:313) at com.avaya.induna.server.db.backup.BackupImplThread.run(BackupImplThre ad.java:175) Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at org.h2.util.NetUtils.createSocket(NetUtils.java:119) at org.h2.util.NetUtils.createSocket(NetUtils.java:100) at org.h2.engine.SessionRemote.initTransfer(SessionRemote.java:100) at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:413) ... 9 more </code></pre>
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    1. USAditya G.
    1. USAditya G.
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    1. This table or related slice is empty.
    1. CODoes it throw an exception? If yes, please post the exception message and stack trace. Or does the method not return? If yes, could you post a full thread dump?
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      1. PODB connection issue between H2 database 1.3.156 (or prior) and 1.3.157 (and onwards)
      1. USThomas Mueller
    2. COadded stacktrace FYR. I used H2 jar 1.3.173 here, but I get the same exception for any jar with version 1.3.157 or above.
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      1. PODB connection issue between H2 database 1.3.156 (or prior) and 1.3.157 (and onwards)
      1. USAditya G.
    3. COI think either the server is not running, there is a firewall that blocks access to this port or IP address, or your TCP/IP configuration (`/etc/hosts`) is problematic.
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      1. PODB connection issue between H2 database 1.3.156 (or prior) and 1.3.157 (and onwards)
      1. USThomas Mueller
 

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