Strange behavior

Hi,

some developers were using the database, and suddenly no one could connect.
Just only some connections that was established before.

As soon as I was advised, I noticed that no postgres process were
present, just only connections and they could run queries normally.
Like this:
desenv:~# ps -ef |grep postgres
postgres 28010 27886 0 15:28 ? 00:00:00 postgres: desenv fabrica
10.90.2.116(57749) idle in transaction
postgres 28013 27886 0 15:29 ? 00:00:00 postgres: desenv fabrica
10.90.2.112(51326) idle
postgres 28051 27886 0 15:33 ? 00:00:01 postgres: desenv fabrica
10.90.2.115(51671) idle in transaction
postgres 28110 27886 0 15:36 ? 00:00:00 postgres: desenv teste
10.90.2.14(48903) idle in transaction
postgres 28134 27886 0 15:36 ? 00:00:01 postgres: desenv fabrica
10.90.2.115(60894) idle in transaction

Strange that no log about what happened, were written.
When I tried to stop, no process message was returned.
Then, I started postgres again, and everything come back to run.

Is there some patch to apply? Is it normal?

Using PostgreSQL 8.1.4 on x86_64-pc-linux-gnu, compiled by GCC cc (GCC)
3.3.5 (Debian 1:3.3.5-13)

Thanks
Alexander

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