RE: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-18 Thread Alfred Bakia
Hi Chris,

A follow-up. I found the following discussion, which goes back to October 19, 
2011:

http://tomcat.10.x6.nabble.com/Reuse-mod-ajp-proxy-connections-td2096715.html

I think it is relevant to this issue. Back then, one Dimitar said:

>> "My understanding of the *reuse* flag in AJP13_END_RESPONSE
>> structure is that this flag is hard coded and cannot be controlled
>> by configuration settings. I couldn't find any in Tomcat AJP
>> connector configuration that could do that."

You responded with:

>> "I'm no expert, but seeing keepalives disabled for a proxy connection
>> would sure make me think that maybe that setting is disabling, ya
>> know, the keepalive-style connection that AJP is supposed to maintain.
>>... I'd try NOT disabling keepalives and see if that helps."

In our set-up, the settings for socket_keepalive is false by default. So, we're 
now going to add the line

worker.workerName.socket_keepalive=true

to the workers.properties file and see what happens.

Kind regards,

Alfred



-Oorspronkelijk bericht-
Van: Alfred Bakia  
Verzonden: 17 June 2020 19:08
Aan: Tomcat Users List 
Onderwerp: RE: Warning "AJP13 protocol: Reuse is set to false" written logs 
every second of every day. Please help.

Hi Chris,

Thanks for your reply. Thanks also for your warning against interfering with 
the setting allowedRequestAttributesPattern ('Setting the value to ".*" is a 
violation of sane security policy'). I guessed as much, and am grateful for 
your confirmation.

On the subject of mod_jk, we are apparently talking about the same thing. In 
our set-up the mod_jk log is called isapi_redirect.log.
The code that generates the error is indeed /native/common/jk_ajp_common.c. The 
part where the error is generated is:

case JK_AJP13_END_RESPONSE:
ae->reuse = (int)jk_b_get_byte(msg);
if (!ae->reuse) {
/*
 * AJP13 protocol reuse flag set to false.
 * Tomcat will close its side of the connection.
 */
jk_log(l, JK_LOG_WARNING, "(%s) AJP13 protocol: Reuse is set to false",
   ae->worker->name);
}

This code snippet says that reuse is determined - at the end of a response - 
from a byte obtained from some message. Which raises two questions:

1) The response to the "ping" REST request has status code 204 ("No Content"). 
If, as you say, a 204 response is OK, then where would the reuse byte come from?
2) Do you know a way to set the "AJP13 protocol reuse flag" to true? As far as 
we know, the only "reuse" settings at our disposal are the current worker 
settings, worker.workerName.connection_pool_size=500
and worker. workerName.max_reuse_connections=250.

Kind regards,

Alfred


-Oorspronkelijk bericht-
Van: Christopher Schultz 
Verzonden: 16 June 2020 19:55
Aan: Tomcat Users List 
Onderwerp: Re: Warning "AJP13 protocol: Reuse is set to false" written logs 
every second of every day. Please help.

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/15/20 09:45, Alfred Bakia wrote:
> Thanks, Chris. To respond to your remarks:
>
> 1) The warnings, "AJP13 protocol: Reuse is set to false", are being
logged by Tomcat (in the Tomcat AJP connector logs).

Weird. I can't find that string anywhere in code or other files in Tomcat, but 
its right there in mod_jk:

./native/common/jk_ajp_common.c:jk_log(l, JK_LOG_WARNING,
"(%s) AJP13 protocol: Reuse is set to false",

Are you sure you are looking at the right log file?

> 2) As I mentioned earlier, the versions and settings of the servers 
> (and their respective IIS web servers) are the same.
>
> In any case I have discovered "how" the warning occurs. It is indeed 
> triggered by the REST API.
>
> The culprit is a REST request in the form:
>
> http://www.ourdomain.com/api/srv2/exercises/93/1431/26346/ping
>
> It is a POST request and "ping" is a custom REST method. It is just a 
> ping, so the status code of the response is 204 ("No Content").

A 204 response should not cause any problem.

> I can confirm that every ping request results in the warning
> "AJP13 protocol: Reuse is set to false" being written to Tomcat's 
> connector logs.
>
> Researching this on the web, I found the suggestion to add 
> allowedRequestAttributesPattern=".*" to the AJP connector in 
> server.xml.
>
> Is this a viable solution?

This has nothing to do with your REST API. This is a change made to recent 
versions of Tomcat that may require you to allow certain non-standard variables 
to be passed-over from your web server to Tomcat via AJP.

If your "ping" REST API is requiring some information to be passed from the web 
server to Tomcat and you are seeing errors on the Tomcat side, then you may 
have to fiddle with the allowedRequestAttributesPattern. Setting the value to 
".*" is a violation of sane security policy.

But I see no evidence that your "Reuse is set to false" error is related (yet) 
to the allowedRequestAttributesPattern. If you see errors in the Tomcat log, 
please post them and we'll see.

The 

RE: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-17 Thread Alfred Bakia
Hi Chris,

Thanks for your reply. Thanks also for your warning against interfering with 
the setting allowedRequestAttributesPattern ('Setting the value to ".*" is a 
violation of sane security policy'). I guessed as much, and am grateful for 
your confirmation.

On the subject of mod_jk, we are apparently talking about the same thing. In 
our set-up the mod_jk log is called isapi_redirect.log.
The code that generates the error is indeed /native/common/jk_ajp_common.c. The 
part where the error is generated is:

case JK_AJP13_END_RESPONSE:
ae->reuse = (int)jk_b_get_byte(msg);
if (!ae->reuse) {
/*
 * AJP13 protocol reuse flag set to false.
 * Tomcat will close its side of the connection.
 */
jk_log(l, JK_LOG_WARNING, "(%s) AJP13 protocol: Reuse is set to false",
   ae->worker->name);
}

This code snippet says that reuse is determined - at the end of a response - 
from a byte obtained from some message. Which raises two questions:

1) The response to the "ping" REST request has status code 204 ("No Content"). 
If, as you say, a 204 response is OK, then where would the reuse byte come from?
2) Do you know a way to set the "AJP13 protocol reuse flag" to true? As far as 
we know, the only "reuse" settings at our disposal are the current worker 
settings, worker.workerName.connection_pool_size=500
and worker. workerName.max_reuse_connections=250.

Kind regards,

Alfred


-Oorspronkelijk bericht-
Van: Christopher Schultz  
Verzonden: 16 June 2020 19:55
Aan: Tomcat Users List 
Onderwerp: Re: Warning "AJP13 protocol: Reuse is set to false" written logs 
every second of every day. Please help.

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/15/20 09:45, Alfred Bakia wrote:
> Thanks, Chris. To respond to your remarks:
>
> 1) The warnings, "AJP13 protocol: Reuse is set to false", are being
logged by Tomcat (in the Tomcat AJP connector logs).

Weird. I can't find that string anywhere in code or other files in Tomcat, but 
its right there in mod_jk:

./native/common/jk_ajp_common.c:jk_log(l, JK_LOG_WARNING,
"(%s) AJP13 protocol: Reuse is set to false",

Are you sure you are looking at the right log file?

> 2) As I mentioned earlier, the versions and settings of the servers 
> (and their respective IIS web servers) are the same.
>
> In any case I have discovered "how" the warning occurs. It is indeed 
> triggered by the REST API.
>
> The culprit is a REST request in the form:
>
> http://www.ourdomain.com/api/srv2/exercises/93/1431/26346/ping
>
> It is a POST request and "ping" is a custom REST method. It is just a 
> ping, so the status code of the response is 204 ("No Content").

A 204 response should not cause any problem.

> I can confirm that every ping request results in the warning
> "AJP13 protocol: Reuse is set to false" being written to Tomcat's 
> connector logs.
>
> Researching this on the web, I found the suggestion to add 
> allowedRequestAttributesPattern=".*" to the AJP connector in 
> server.xml.
>
> Is this a viable solution?

This has nothing to do with your REST API. This is a change made to recent 
versions of Tomcat that may require you to allow certain non-standard variables 
to be passed-over from your web server to Tomcat via AJP.

If your "ping" REST API is requiring some information to be passed from the web 
server to Tomcat and you are seeing errors on the Tomcat side, then you may 
have to fiddle with the allowedRequestAttributesPattern. Setting the value to 
".*" is a violation of sane security policy.

But I see no evidence that your "Reuse is set to false" error is related (yet) 
to the allowedRequestAttributesPattern. If you see errors in the Tomcat log, 
please post them and we'll see.

The allowedRequestAttributesPattern wasn't added to Tomcat until
9.0.31 so if you really are running 9.0.21, then adding 
allowedRequestAttributesPattern will accomplish nothing.

- -chris
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Re: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-16 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/15/20 09:45, Alfred Bakia wrote:
> Thanks, Chris. To respond to your remarks:
>
> 1) The warnings, "AJP13 protocol: Reuse is set to false", are
> being
logged by Tomcat (in the Tomcat AJP connector logs).

Weird. I can't find that string anywhere in code or other files in
Tomcat, but its right there in mod_jk:

./native/common/jk_ajp_common.c:jk_log(l, JK_LOG_WARNING,
"(%s) AJP13 protocol: Reuse is set to false",

Are you sure you are looking at the right log file?

> 2) As I mentioned earlier, the versions and settings of the
> servers (and their respective IIS web servers) are the same.
>
> In any case I have discovered "how" the warning occurs. It is
> indeed triggered by the REST API.
>
> The culprit is a REST request in the form:
>
> http://www.ourdomain.com/api/srv2/exercises/93/1431/26346/ping
>
> It is a POST request and "ping" is a custom REST method. It is
> just a ping, so the status code of the response is 204 ("No
> Content").

A 204 response should not cause any problem.

> I can confirm that every ping request results in the warning
> "AJP13 protocol: Reuse is set to false" being written to Tomcat's
> connector logs.
>
> Researching this on the web, I found the suggestion to add
> allowedRequestAttributesPattern=".*" to the AJP connector in
> server.xml.
>
> Is this a viable solution?

This has nothing to do with your REST API. This is a change made to
recent versions of Tomcat that may require you to allow certain
non-standard variables to be passed-over from your web server to
Tomcat via AJP.

If your "ping" REST API is requiring some information to be passed
from the web server to Tomcat and you are seeing errors on the Tomcat
side, then you may have to fiddle with the
allowedRequestAttributesPattern. Setting the value to ".*" is a
violation of sane security policy.

But I see no evidence that your "Reuse is set to false" error is
related (yet) to the allowedRequestAttributesPattern. If you see
errors in the Tomcat log, please post them and we'll see.

The allowedRequestAttributesPattern wasn't added to Tomcat until
9.0.31 so if you really are running 9.0.21, then adding
allowedRequestAttributesPattern will accomplish nothing.

- -chris
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RE: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-15 Thread Alfred Bakia
Thanks, Chris.
To respond to your remarks:

1) The warnings, "AJP13 protocol: Reuse is set to false", are being logged by 
Tomcat (in the Tomcat AJP connector logs).

2) As I mentioned earlier, the versions and settings of the servers (and their 
respective IIS web servers) are the same.

In any case I have discovered "how" the warning occurs. It is indeed triggered 
by the REST API. 

The culprit is a REST request in the form:

http://www.ourdomain.com/api/srv2/exercises/93/1431/26346/ping

It is a POST request and "ping" is a custom REST method. It is just a ping, so 
the status code of the response is 204 ("No Content").

I can confirm that every ping request results in the warning "AJP13 protocol: 
Reuse is set to false" being written to Tomcat's connector logs.

Researching this on the web, I found the suggestion to add 
allowedRequestAttributesPattern=".*" to the AJP connector in server.xml. 
Is this a viable solution?

Alfred


-Oorspronkelijk bericht-
Van: Christopher Schultz  
Verzonden: 12 June 2020 19:49
Aan: Tomcat Users List 
Onderwerp: Re: Warning "AJP13 protocol: Reuse is set to false" written logs 
every second of every day. Please help.

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/12/20 05:52, Alfred Bakia wrote:
> Thanks, Jon. I did in fact compare all the settings between the 
> servers, including the logging settings. They are exactly the same.> 
> But there is new information. In a detailed comparison of the Java 
> code between the servers, I spotted one difference.
> Something sets apart the instance that is logging the Warning
> "AJP13 protocol: Reuse is set to false". The instance includes a REST 
> API. As Sherlock Holmes said, "When you have eliminated all which is 
> impossible, then whatever remains, however improbable, must be the 
> truth."
>
> I am now looking into how the combination REST - Tomcat - IIS can 
> trigger the warning.
...but this is being logged on the IIS side, not the Tomcat side. It's very 
unlikely that the application is causing these log messages to be displayed.

Same version(s) of IIS? Same versions of mod_jk?

- -chris

> -Oorspronkelijk bericht- Van:
> jonmcalexan...@wellsfargo.com.INVALID

> Verzonden: 11 June 2020 23:57 Aan: users@tomcat.apache.org
> Onderwerp: RE: Warning "AJP13 protocol: Reuse is set to false"
> written
logs every second of every day. Please help.
>
> Perhaps also compare your logging sensitivity between the servers.
>
>
> Dream * Excel * Explore * Inspire Jon McAlexander Asst Vice President
>
> Middleware Product Engineering Enterprise CIO | Platform Services
> | Middleware | Infrastructure Solutions
>
> 8080 Cobblestone Rd | Urbandale, IA 50322 MAC: F4469-010 Tel
> 515-988-2508 | Cell 515-988-2508
>
> jonmcalexan...@wellsfargo.com
>
>
> This message may contain confidential and/or privileged information.
If you are not the addressee or authorized to receive this for the addressee, 
you must not use, copy, disclose, or take any action based on this message or 
any information herein. If you have received this message in error, please 
advise the sender immediately by reply e-mail and delete this message. Thank 
you for your cooperation.
>
> -Original Message- From: Christopher Schultz 
>  Sent: Thursday, June 11, 2020 12:55 PM 
> To: users@tomcat.apache.org Subject: Re: Warning "AJP13
> protocol: Reuse is set to false" written
logs every second of every day. Please help.
>
> Alfred,
>
> On 6/11/20 11:57, Alfred Bakia wrote:
>> Hi Everyone,
>
>> This is my very first mail to the users list since joining yesterday. 
>> Not an auspicious start. But I hope I will be able to contribute in 
>> future. I seek your help for a persistent issue in one of our 
>> ColdFusion instances.
>
>> Description of issue: ColdFusion 2018 is an application server that 
>> uses Tomcat 9.0.21. Our ColdFusion installation consists of 
>> instances. The instances are independent application servers, each 
>> with its own Tomcat installation and Java Virtual Machine.
>> The Java version is 11.0.7.
>
>> Each ColdFusion instance serves web content via the web server IIS. 
>> We have configured an AJP connector for the communication between 
>> Tomcat and IIS. The relevant settings are
>
>
>> *   In server.xml
>
>> > redirectPort="8445" protocol="AJP/1.3"
>> tomcatAuthentication="false" maxThreads="500"
>> packetSize="65535"/>
>
>
>> *   In isapi_redirect.properties
>
>> iis_buffer_enable= true
>
>
>> *   In workers.properties
>
>> worker.list=sr1studierdr1
>
>> worker.sr1studierdr1.type=ajp13
>
>> worker.sr1studierdr1.host=localhost
>
>> worker.sr1studierdr1.port=8012
>
>> worker.sr1studierdr1.connection_pool_size=800
>
>> worker.sr1studierdr1.connection_pool_timeout=60
>
>> worker.sr1studierdr1.max_reuse_connections=400''
>
>> On one of the instances (name: 'sr1studierdr1'), the following 
>> WARNING is written to isapi_redirect.log every second or so:
>
>
>> *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn]

Re: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-12 Thread Konstantin Kolinko
чт, 11 июн. 2020 г. в 18:57, Alfred Bakia :
>
> Description of issue:
> ColdFusion 2018 is an application server that uses Tomcat 9.0.21. Our 
> ColdFusion installation consists of instances. The instances are independent 
> application servers, each with its own Tomcat installation and Java Virtual 
> Machine. The Java version is 11.0.7.
>
> Each ColdFusion instance serves web content via the web server IIS.  We have 
> configured an AJP connector for the communication between Tomcat and IIS. The 
> relevant settings are
>
>
>   *   In server.xml
>
>  protocol="AJP/1.3" tomcatAuthentication="false" maxThreads="500" 
> packetSize="65535"/>

The packetSize has non-default value. The configuration reference [1]
says that the same value should be configured on the other side as
well, mentioning "max_packet_size" for mod_jk. I am not sure how that
is done for IIS.

[1] https://tomcat.apache.org/tomcat-9.0-doc/config/ajp.html


> On one of the instances (name: 'sr1studierdr1'), the following WARNING is 
> written to isapi_redirect.log every second or so:
>
>
>   *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn] 
> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1) AJP13 protocol: 
> Reuse is set to false

Searching the sources, the code that writes it appears to be in
native/common/jk_ajp_common.c

https://github.com/apache/tomcat-connectors/blob/master/native/common/jk_ajp_common.c#L2117

It is triggered by a value of a "reuse flag" field in an "END_RESPONSE" packet.

https://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html#End_Response

At Tomcat side the END_RESPONSE packet is sent by
AjpProcessor.finishResponse() and can send two kinds of an end
response packet: one with a "reuse" flag value and another with a "no
reuse".

https://github.com/apache/tomcat/blob/9.0.x/java/org/apache/coyote/ajp/AjpProcessor.java#L104
https://github.com/apache/tomcat/blob/9.0.x/java/org/apache/coyote/ajp/AjpProcessor.java#L1049.

If there is a severe error that does not allow reuse of the
connection, the "no reuse" packet is sent. I wonder how you encounter
such an error.

Do you have an access log configured in Tomcat and what does it show?

Best regards,
Konstantin Kolinko

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Re: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-12 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/12/20 05:52, Alfred Bakia wrote:
> Thanks, Jon. I did in fact compare all the settings between the
> servers, including the logging settings. They are exactly the
> same.> But there is new information. In a detailed comparison of
> the Java code between the servers, I spotted one difference.
> Something sets apart the instance that is logging the Warning
> "AJP13 protocol: Reuse is set to false". The instance includes a
> REST API. As Sherlock Holmes said, "When you have eliminated all
> which is impossible, then whatever remains, however improbable,
> must be the truth."
>
> I am now looking into how the combination REST - Tomcat - IIS can
> trigger the warning.
...but this is being logged on the IIS side, not the Tomcat side. It's
very unlikely that the application is causing these log messages to be
displayed.

Same version(s) of IIS? Same versions of mod_jk?

- -chris

> -Oorspronkelijk bericht- Van:
> jonmcalexan...@wellsfargo.com.INVALID

> Verzonden: 11 June 2020 23:57 Aan: users@tomcat.apache.org
> Onderwerp: RE: Warning "AJP13 protocol: Reuse is set to false"
> written
logs every second of every day. Please help.
>
> Perhaps also compare your logging sensitivity between the servers.
>
>
> Dream * Excel * Explore * Inspire Jon McAlexander Asst Vice
> President
>
> Middleware Product Engineering Enterprise CIO | Platform Services
> | Middleware | Infrastructure Solutions
>
> 8080 Cobblestone Rd | Urbandale, IA 50322 MAC: F4469-010 Tel
> 515-988-2508 | Cell 515-988-2508
>
> jonmcalexan...@wellsfargo.com
>
>
> This message may contain confidential and/or privileged
> information.
If you are not the addressee or authorized to receive this for the
addressee, you must not use, copy, disclose, or take any action based on
this message or any information herein. If you have received this
message in error, please advise the sender immediately by reply e-mail
and delete this message. Thank you for your cooperation.
>
> -Original Message- From: Christopher Schultz
>  Sent: Thursday, June 11, 2020 12:55
> PM To: users@tomcat.apache.org Subject: Re: Warning "AJP13
> protocol: Reuse is set to false" written
logs every second of every day. Please help.
>
> Alfred,
>
> On 6/11/20 11:57, Alfred Bakia wrote:
>> Hi Everyone,
>
>> This is my very first mail to the users list since joining
>> yesterday. Not an auspicious start. But I hope I will be able to
>> contribute in future. I seek your help for a persistent issue in
>> one of our ColdFusion instances.
>
>> Description of issue: ColdFusion 2018 is an application server
>> that uses Tomcat 9.0.21. Our ColdFusion installation consists of
>> instances. The instances are independent application servers,
>> each with its own Tomcat installation and Java Virtual Machine.
>> The Java version is 11.0.7.
>
>> Each ColdFusion instance serves web content via the web server
>> IIS. We have configured an AJP connector for the communication
>> between Tomcat and IIS. The relevant settings are
>
>
>> *   In server.xml
>
>> > redirectPort="8445" protocol="AJP/1.3"
>> tomcatAuthentication="false" maxThreads="500"
>> packetSize="65535"/>
>
>
>> *   In isapi_redirect.properties
>
>> iis_buffer_enable= true
>
>
>> *   In workers.properties
>
>> worker.list=sr1studierdr1
>
>> worker.sr1studierdr1.type=ajp13
>
>> worker.sr1studierdr1.host=localhost
>
>> worker.sr1studierdr1.port=8012
>
>> worker.sr1studierdr1.connection_pool_size=800
>
>> worker.sr1studierdr1.connection_pool_timeout=60
>
>> worker.sr1studierdr1.max_reuse_connections=400''
>
>> On one of the instances (name: 'sr1studierdr1'), the following
>> WARNING is written to isapi_redirect.log every second or so:
>
>
>> *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn]
>> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1)
>> AJP13 protocol: Reuse is set to false
>
>> Nevertheless, the application seems to work as intended.
>
>> We're at a loss why this is happening only to this particular
>> instance. There are no such warnings in other instances that
>> share exactly the same settings.
>
>> Do you know what is causing the warning, "AJP13 protocol: Reuse
>> is set to false", or how to solve this?
>
> I have no idea, but Google seemed able to come up with this:
>
> https://forums.iis.net/t/1229345.aspx?Error+AJP13+protocol+Reuse+is+se
t+
>
>
>
to+false+on+log+file+
>
> Does that help at all?
>
> Apache httpd configuration of mod_jk has a DisableReuse flag that
> can be set, but I don't see such a thing for IIS.
>
> -chris
>
> -
>
>
>
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RE: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-12 Thread Alfred Bakia
Thanks, Jon.
I did in fact compare all the settings between the servers, including the 
logging settings. They are exactly the same. 

But there is new information. In a detailed comparison of the Java code between 
the servers, I spotted one difference. Something sets apart the instance that 
is logging the Warning "AJP13 protocol: Reuse is set to false". The instance 
includes a REST API. As Sherlock Holmes said, "When you have eliminated all 
which is impossible, then whatever remains, however improbable, must be the 
truth." 

I am now looking into how the combination REST - Tomcat - IIS can trigger the 
warning.

Regards,

Alfred


-Oorspronkelijk bericht-
Van: jonmcalexan...@wellsfargo.com.INVALID 
 
Verzonden: 11 June 2020 23:57
Aan: users@tomcat.apache.org
Onderwerp: RE: Warning "AJP13 protocol: Reuse is set to false" written logs 
every second of every day. Please help.

Perhaps also compare your logging sensitivity between the servers.


Dream * Excel * Explore * Inspire
Jon McAlexander
Asst Vice President

Middleware Product Engineering
Enterprise CIO | Platform Services | Middleware | Infrastructure Solutions

8080 Cobblestone Rd | Urbandale, IA 50322
MAC: F4469-010
Tel 515-988-2508 | Cell 515-988-2508

jonmcalexan...@wellsfargo.com


This message may contain confidential and/or privileged information. If you are 
not the addressee or authorized to receive this for the addressee, you must not 
use, copy, disclose, or take any action based on this message or any 
information herein. If you have received this message in error, please advise 
the sender immediately by reply e-mail and delete this message. Thank you for 
your cooperation.

-Original Message-
From: Christopher Schultz 
Sent: Thursday, June 11, 2020 12:55 PM
To: users@tomcat.apache.org
Subject: Re: Warning "AJP13 protocol: Reuse is set to false" written logs every 
second of every day. Please help.

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/11/20 11:57, Alfred Bakia wrote:
> Hi Everyone,
>
> This is my very first mail to the users list since joining yesterday. 
> Not an auspicious start. But I hope I will be able to contribute in 
> future. I seek your help for a persistent issue in one of our 
> ColdFusion instances.
>
> Description of issue: ColdFusion 2018 is an application server that 
> uses Tomcat 9.0.21. Our ColdFusion installation consists of instances.
> The instances are independent application servers, each with its own 
> Tomcat installation and Java Virtual Machine. The Java version is 
> 11.0.7.
>
> Each ColdFusion instance serves web content via the web server IIS.
> We have configured an AJP connector for the communication between 
> Tomcat and IIS. The relevant settings are
>
>
> *   In server.xml
>
>  redirectPort="8445" protocol="AJP/1.3" tomcatAuthentication="false"
> maxThreads="500" packetSize="65535"/>
>
>
> *   In isapi_redirect.properties
>
> iis_buffer_enable= true
>
>
> *   In workers.properties
>
> worker.list=sr1studierdr1
>
> worker.sr1studierdr1.type=ajp13
>
> worker.sr1studierdr1.host=localhost
>
> worker.sr1studierdr1.port=8012
>
> worker.sr1studierdr1.connection_pool_size=800
>
> worker.sr1studierdr1.connection_pool_timeout=60
>
> worker.sr1studierdr1.max_reuse_connections=400''
>
> On one of the instances (name: 'sr1studierdr1'), the following WARNING 
> is written to isapi_redirect.log every second or so:
>
>
> *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn]
> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1) AJP13
> protocol: Reuse is set to false
>
> Nevertheless, the application seems to work as intended.
>
> We're at a loss why this is happening only to this particular 
> instance. There are no such warnings in other instances that share 
> exactly the same settings.
>
> Do you know what is causing the warning, "AJP13 protocol: Reuse is set 
> to false", or how to solve this?

I have no idea, but Google seemed able to come up with this:

https://forums.iis.net/t/1229345.aspx?Error+AJP13+protocol+Reuse+is+set+
to+false+on+log+file+

Does that help at all?

Apache httpd configuration of mod_jk has a DisableReuse flag that can be set, 
but I don't see such a thing for IIS.

- -chris
-BEGIN PGP SIGNATURE-
Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/

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RE: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-11 Thread jonmcalexander
Perhaps also compare your logging sensitivity between the servers.


Dream * Excel * Explore * Inspire
Jon McAlexander
Asst Vice President

Middleware Product Engineering
Enterprise CIO | Platform Services | Middleware | Infrastructure Solutions

8080 Cobblestone Rd | Urbandale, IA 50322
MAC: F4469-010
Tel 515-988-2508 | Cell 515-988-2508

jonmcalexan...@wellsfargo.com


This message may contain confidential and/or privileged information. If you are 
not the addressee or authorized to receive this for the addressee, you must not 
use, copy, disclose, or take any action based on this message or any 
information herein. If you have received this message in error, please advise 
the sender immediately by reply e-mail and delete this message. Thank you for 
your cooperation.

-Original Message-
From: Christopher Schultz  
Sent: Thursday, June 11, 2020 12:55 PM
To: users@tomcat.apache.org
Subject: Re: Warning "AJP13 protocol: Reuse is set to false" written logs every 
second of every day. Please help.

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/11/20 11:57, Alfred Bakia wrote:
> Hi Everyone,
>
> This is my very first mail to the users list since joining yesterday. 
> Not an auspicious start. But I hope I will be able to contribute in 
> future. I seek your help for a persistent issue in one of our 
> ColdFusion instances.
>
> Description of issue: ColdFusion 2018 is an application server that 
> uses Tomcat 9.0.21. Our ColdFusion installation consists of instances. 
> The instances are independent application servers, each with its own 
> Tomcat installation and Java Virtual Machine. The Java version is 
> 11.0.7.
>
> Each ColdFusion instance serves web content via the web server IIS.
> We have configured an AJP connector for the communication between 
> Tomcat and IIS. The relevant settings are
>
>
> *   In server.xml
>
>  redirectPort="8445" protocol="AJP/1.3" tomcatAuthentication="false"
> maxThreads="500" packetSize="65535"/>
>
>
> *   In isapi_redirect.properties
>
> iis_buffer_enable= true
>
>
> *   In workers.properties
>
> worker.list=sr1studierdr1
>
> worker.sr1studierdr1.type=ajp13
>
> worker.sr1studierdr1.host=localhost
>
> worker.sr1studierdr1.port=8012
>
> worker.sr1studierdr1.connection_pool_size=800
>
> worker.sr1studierdr1.connection_pool_timeout=60
>
> worker.sr1studierdr1.max_reuse_connections=400''
>
> On one of the instances (name: 'sr1studierdr1'), the following WARNING 
> is written to isapi_redirect.log every second or so:
>
>
> *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn]
> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1) AJP13
> protocol: Reuse is set to false
>
> Nevertheless, the application seems to work as intended.
>
> We're at a loss why this is happening only to this particular 
> instance. There are no such warnings in other instances that share 
> exactly the same settings.
>
> Do you know what is causing the warning, "AJP13 protocol: Reuse is set 
> to false", or how to solve this?

I have no idea, but Google seemed able to come up with this:

https://forums.iis.net/t/1229345.aspx?Error+AJP13+protocol+Reuse+is+set+
to+false+on+log+file+

Does that help at all?

Apache httpd configuration of mod_jk has a DisableReuse flag that can be set, 
but I don't see such a thing for IIS.

- -chris
-BEGIN PGP SIGNATURE-
Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/

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Re: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help.

2020-06-11 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Alfred,

On 6/11/20 11:57, Alfred Bakia wrote:
> Hi Everyone,
>
> This is my very first mail to the users list since joining
> yesterday. Not an auspicious start. But I hope I will be able to
> contribute in future. I seek your help for a persistent issue in
> one of our ColdFusion instances.
>
> Description of issue: ColdFusion 2018 is an application server that
> uses Tomcat 9.0.21. Our ColdFusion installation consists of
> instances. The instances are independent application servers, each
> with its own Tomcat installation and Java Virtual Machine. The Java
> version is 11.0.7.
>
> Each ColdFusion instance serves web content via the web server IIS.
> We have configured an AJP connector for the communication between
> Tomcat and IIS. The relevant settings are
>
>
> *   In server.xml
>
>  redirectPort="8445" protocol="AJP/1.3" tomcatAuthentication="false"
> maxThreads="500" packetSize="65535"/>
>
>
> *   In isapi_redirect.properties
>
> iis_buffer_enable= true
>
>
> *   In workers.properties
>
> worker.list=sr1studierdr1
>
> worker.sr1studierdr1.type=ajp13
>
> worker.sr1studierdr1.host=localhost
>
> worker.sr1studierdr1.port=8012
>
> worker.sr1studierdr1.connection_pool_size=800
>
> worker.sr1studierdr1.connection_pool_timeout=60
>
> worker.sr1studierdr1.max_reuse_connections=400''
>
> On one of the instances (name: 'sr1studierdr1'), the following
> WARNING is written to isapi_redirect.log every second or so:
>
>
> *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn]
> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1) AJP13
> protocol: Reuse is set to false
>
> Nevertheless, the application seems to work as intended.
>
> We're at a loss why this is happening only to this particular
> instance. There are no such warnings in other instances that share
> exactly the same settings.
>
> Do you know what is causing the warning, "AJP13 protocol: Reuse is
> set to false", or how to solve this?

I have no idea, but Google seemed able to come up with this:

https://forums.iis.net/t/1229345.aspx?Error+AJP13+protocol+Reuse+is+set+
to+false+on+log+file+

Does that help at all?

Apache httpd configuration of mod_jk has a DisableReuse flag that can
be set, but I don't see such a thing for IIS.

- -chris
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Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/

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