Thanks Tomaz, will do that.

BTW I set (via CLI) tcp-keep-alive=true in /subsystem=undertow/server=default-server/http-listener=default. It was "undefined" before I set it to true. This seamed to improve the situation a little, although not enough (established connections decay very slowly - several minutes, sometimes more). I couldn't find in the documentation what this attribute is responsible for, can you point some documentation about it? The same for the tcp-backlog attribute.

Thank you very much,

Renan.

For documentation and "forum search optimization":

Opened an issue: [WFLY-3536] Wildfly 8.1.0 Final keeps established connections forever - JBoss Issue Tracker.

By the way I think these options (tcp-backlog, tcp-keep-alive and others) should be better documented, specially because Undertow is "so new".

BR everyone,

Renan

Hi Daniel,

No solution yet, but after I set

     tcp-keep-alive=true  in  /subsystem=undertow/server=default-server/http-listener=default

things got stable enough for me. The problem still exists, but the number of connections do not grow that fast. This is the only workaround I know. If you go to the link in the JIRA about this bug, you'll see people compiling Wildfly 8.2 to overcome this issue, but I am unable to do this test write now. If I find a permanent solution I'll post here.

Best Regards,

Renan

Daniel, these are my configuration:

<subsystem xmlns="urn:jboss:domain:io:1.1">

  <worker name="default" io-threads="25" task-keepalive="10" task-max-threads="60"/>

  <buffer-pool name="default" buffer-size="16384" buffers-per-slice="128" direct-buffers="true"/>

</subsystem>

<subsystem xmlns="urn:jboss:domain:undertow:1.1">

  <buffer-cache name="default"/>

  <server name="default-server">

  <http-listener name="default" socket-binding="http" tcp-keep-alive="true"/>

  <https-listener name="https" socket-binding="https" security-realm="ApplicationRealm"/>

  <host name="default-host" alias="localhost">

  <location name="/" handler="welcome-content"/>

  <filter-ref name="server-header"/>

  <filter-ref name="x-powered-by-header"/>

  </host>

  </server>

  <servlet-container name="default" ignore-flush="true">

  <jsp-config/>

  </servlet-container>

  <handlers>

  <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/>

  </handlers>

  <filters>

  <response-header name="server-header" header-name="Server" header-value="WildFly/8"/>

  <response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1"/>

  </filters>

</subsystem>

Fixed for Wildfly 8.2.0 and 9.0.0: