Hi Chuck,
Have tested with both on a server that is up and running already servicing
clients and also right after restart. Don't think thread creation time is the
bottleneck here.
I don’t have Linux access currently. If I manage to test, I will let you know.
Regards,
John
-Original Mess
(sorry for any errors, I'm bashing this out quickly on my phone before
going to bed)
On Fri, Aug 8, 2025, 00:59 Daniel Schwartz wrote:
> Hello Chuck,
>
> You are correct, I only catch SQL exceptions. I have modified my code so
> that the Connection object will be closed if an SQL exception is t
Hello Chuck,
You are correct, I only catch SQL exceptions. I have modified my code so that
the Connection object will be closed if an SQL exception is thrown, but I
wasn’t aware that there are other types of exceptions that I should look for.
I will look into this.
However, I don’t think tha
From: Chuck Caldarale
Sent: Thursday, August 7, 2025 11:52 PM
To: Tomcat Users List
Subject: Re: How to access a REST service
> On 2025 Aug 7, at 21:43, Daniel Schwartz
> mailto:d...@danielgschwartz.com>> wrote: > > I have
> just posted everything again, this time with a few modifications. You
> On 2025 Aug 7, at 21:43, Daniel Schwartz wrote:
>
> I have just posted everything again, this time with a few modifications. You
> say, "Last time you posted it, it was prone to leaking connection." Could
> you say more exactly where you see saw the leak?
You only catch errors of the ty
Hello Robert,
I have just posted everything again, this time with a few modifications. You
say, "Last time you posted it, it was prone to leaking connection." Could you
say more exactly where you see saw the leak?
Thanks,
Dan Schwartz
-Original Message-
From: Robert Turner
Sent: T
Robert, Chris, and others who have responded to my queries,
Everyone is convinced that I have problem with my code. Here are what I
consider to be the relevant code fragments. I've also indicated where I
consider it to be possible that there might be a memory leak, but I'm not sure
about this
> I believe that the essential problem, as explained in a previous email to Rob
> Sargent, is that I'm getting several hundred database requests per day from
> web crawlers. I just spent some time reading through my ngnix access.log and
> found that the vast majority of these are from GoogleBot
> On 2025 Aug 7, at 18:16, John Williams
> wrote:
>
> I am aware that the TCP backlog queue and concurrent connections are
> different. The problem occurs before the connection is fully established.
>
> My testing scenario is:
> - A total of 500 connections are attempted concurrently using 5
Chuck,
I am aware that the TCP backlog queue and concurrent connections are different.
The problem occurs before the connection is fully established.
My testing scenario is:
- A total of 500 connections are attempted concurrently using 500 threads from
a client application. These connections g
> On 2025 Aug 6, at 18:29, John Williams
> wrote:
>
> I have Tomcat 11 running on Windows. When I get a spurt of connections, the
> client sees "Connection Refused" errors sporadically. I have tried increasing
> the acceptCount for the connector and that does not help.
>
> From what I am re
I have tested with Tomcat 11.0.9 and JDK 21.0.8+9. Both of these are the latest
versions and I see the issue below with TCP connections being refused though my
server resources are fine.
Regards,
John
-Original Message-
From: r.barc...@habmalnefrage.de.INVALID
Sent: Thursday, August
Dan,
On Thu, Aug 7, 2025 at 5:01 PM Daniel Schwartz
wrote:
> Hello Chris,
>
> Thank you for your reply, but I'm still unsure. You seem to be implying
> that I have a memory leak, i.e., many connection objects being created that
> are not being closed. However, I really don't think this is happ
Hello Chris,
Thank you for your reply, but I'm still unsure. You seem to be implying that I
have a memory leak, i.e., many connection objects being created that are not
being closed. However, I really don't think this is happening. My code closes
each connection immediately after using it.
Daniel,
On 8/5/25 12:43 PM, Daniel Schwartz wrote:
My understanding is that only as many connection objects are created
and placed in the pool as are needed, so even if you set the upper
limit high it doesn’t necessarily mean that you will have that many.
This is correct.
Once a database sess
The Apache Tomcat team announces the immediate availability of Apache
Tomcat 10.1.44.
Apache Tomcat 10 is an open source software implementation of the
Jakarta Servlet, Jakarta Pages, Jakarta Expression Language, Jakarta
WebSocket, Jakarta Authentication and Jakarta Annotations specifications.
All,
Over the next few days the Tomcat security team will be updating the
official CVE records for Tomcat CVEs CVE-2022-45143 onwards to
explicitly state (rather than just imply) that "Older, EOL versions may
also be affected."
We will also explicitly add a version range with a start of "3"
The Apache Tomcat team announces the immediate availability of Apache
Tomcat 11.0.10.
Apache Tomcat 11 is an open source software implementation of the
Jakarta Servlet, Jakarta Pages, Jakarta Expression Language, Jakarta
WebSocket, Jakarta Authentication and Jakarta Annotations specifications.
> Does Tomcat provide a way to increase the OS level TCP backlog queue length,
> and if not, can this be considered in the roadmap?
>
> This seems to be a scalability issue for Tomcat - 200 concurrent connection
> limit appears to be a very low number. Please correct me if I am wrong.
Hi,
Thi
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