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JVM crash when select count(*) on large table through JDBC

From: "Kai Ruhl" <k(dot)ruhl(at)etamax(dot)de>
To: <pgsql-jdbc(at)postgresql(dot)org>
Subject: JVM crash when select count(*) on large table through JDBC
Date: 2008-02-22 16:25:15
Message-ID: EA13934D0B77D048A9BFD95BDA9D5C7D1DFC05@ariane5.etamax.site (view raw or flat)
Thread:
Lists: pgsql-jdbc
Hello,

I have a curious problem, which I would like to know whether somebody
can reproduce this: From a JVM using JDBC, I issue

	select count(*) from big_table

where big table has more than 20 million entries (timestamps and
numbers). Upon PreparedStatement.executeQuery(), the VM quits, without
any message.

Java VM: 1.4.2-16 (latest one)
Pg-Jdbc: JDBC3 Postgresql Driver, Version 8.3-603
Server:  PostgreSQL 8.1.11 (on Debian etch)

The most surprising thing is the lack of any error message (I had
expected a TimeOutException, or OutOfMemoryError, or the like), as if
someone had called System.exit().

The same commando, when executed through pgAdmin III, works.

As suggested on the website (http://jdbc.postgresql.org/lists.html), I
have searched the mailing lists, to no avail so far.

I would highly appreciate any reproduction of these results, or
suggestions for remedy.

Kind regards,

  Kai Ruhl


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