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https://issues.apache.org/jira/browse/AXIS2-6030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17545211#comment-17545211
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David Steindorfer commented on AXIS2-6030:
------------------------------------------
Hi [~robertlazarski]
Thank you for the reply.
In fact our project was configured for HTTP Client 4x since at least 2020.
For 1.7.9 and 1.8.0 I use exactly the same configuration as seen here:
-
https://github.com/dsteindo/Axis2Examples/blob/main/1.7.9/jaxws/resources/axis2/default/conf/axis2.xml
-
https://github.com/dsteindo/Axis2Examples/blob/main/1.8.0/jaxws/resources/axis2/default/conf/axis2.xml
The httpclient libraries are a maven dependency of axis2 I think
For 1.7.9 they are
- httpclient-4.5.3.jar
- httpcore-4.4.6.jar
For 1.8.0 they are
- httpclient-4.5.13.jar
- httpcore-4.4.13.jar
I try to remember what I saw when digging (debugging) through the code where I
noticed some difference in 1.7.9 and 1.8.0
*1.7.9*
Here I see that the connection is released:
{code}
release:404, AbstractConnPool (org.apache.http.pool)
releaseConnection:272, PoolingClientConnectionManager
(org.apache.http.impl.conn)
releaseConnection:472, ManagedClientConnectionImpl (org.apache.http.impl.conn)
releaseManagedConnection:204, BasicManagedEntity (org.apache.http.conn)
eofDetected:152, BasicManagedEntity (org.apache.http.conn)
checkEOF:199, EofSensorInputStream (org.apache.http.conn)
read:136, EofSensorInputStream (org.apache.http.conn)
read:48, DetachableInputStream (org.apache.axiom.om.impl.common.factory)
readBytes:155, BaseReader (com.ctc.wstx.io)
loadMore:369, UTF8Reader (com.ctc.wstx.io)
read:116, UTF8Reader (com.ctc.wstx.io)
read:104, MergedReader (com.ctc.wstx.io)
readInto:88, ReaderSource (com.ctc.wstx.io)
readInto:57, BranchingReaderSource (com.ctc.wstx.io)
loadMore:1011, StreamScanner (com.ctc.wstx.sr)
getNext:770, StreamScanner (com.ctc.wstx.sr)
nextFromProlog:2096, BasicStreamReader (com.ctc.wstx.sr)
closeContentTree:3000, BasicStreamReader (com.ctc.wstx.sr)
nextFromTree:2748, BasicStreamReader (com.ctc.wstx.sr)
next:1122, BasicStreamReader (com.ctc.wstx.sr)
next:225, XMLStreamReaderWrapper (org.apache.axiom.util.stax.wrapper)
next:34, DisallowDoctypeDeclStreamReaderWrapper
(org.apache.axiom.util.stax.dialect)
parserNext:666, StAXOMBuilder (org.apache.axiom.om.impl.builder)
next:184, StAXOMBuilder (org.apache.axiom.om.impl.builder)
_getBlockFromOMElement:631, XMLSpineImpl (org.apache.axis2.jaxws.message.impl)
getBodyBlock:348, XMLSpineImpl (org.apache.axis2.jaxws.message.impl)
getBodyBlock:521, XMLPartBase (org.apache.axis2.jaxws.message.impl)
getBodyBlock:668, MessageImpl (org.apache.axis2.jaxws.message.impl)
getReturnElement:724, MethodMarshallerUtils
(org.apache.axis2.jaxws.marshaller.impl.alt)
demarshalResponse:121, DocLitBareMethodMarshaller
(org.apache.axis2.jaxws.marshaller.impl.alt)
createResponse:546, JAXWSProxyHandler (org.apache.axis2.jaxws.client.proxy)
invokeSEIMethod:386, JAXWSProxyHandler (org.apache.axis2.jaxws.client.proxy)
invoke:171, JAXWSProxyHandler (org.apache.axis2.jaxws.client.proxy)
pingOperation:-1, $Proxy62 (com.sun.proxy)
ping:54, PingTest (at.dsteindo.axis2.execute)
execute:18, PingTest (at.dsteindo.axis2.execute)
main:18, Registry (at.dsteindo.axis2.core)
{code}
*1.8.0*
It goes a somewhat different path and I can go until
org.apache.axis2.jaxws.message.impl.XMLSpineImpl#_getBlockFromOMElement
{code}
_getBlockFromOMElement:561, XMLSpineImpl (org.apache.axis2.jaxws.message.impl)
getBodyBlock:336, XMLSpineImpl (org.apache.axis2.jaxws.message.impl)
getBodyBlock:520, XMLPartBase (org.apache.axis2.jaxws.message.impl)
getBodyBlock:668, MessageImpl (org.apache.axis2.jaxws.message.impl)
getReturnElement:724, MethodMarshallerUtils
(org.apache.axis2.jaxws.marshaller.impl.alt)
demarshalResponse:120, DocLitBareMinimalMethodMarshaller
(org.apache.axis2.jaxws.marshaller.impl.alt)
createResponse:546, JAXWSProxyHandler (org.apache.axis2.jaxws.client.proxy)
invokeSEIMethod:386, JAXWSProxyHandler (org.apache.axis2.jaxws.client.proxy)
invoke:171, JAXWSProxyHandler (org.apache.axis2.jaxws.client.proxy)
echoOperation:-1, $Proxy61 (com.sun.proxy)
echoOperation:116, EchoServicePortProxy
(org.apache.axis2.jaxws.samples.client.echo)
echo:62, EchoTest (at.dsteindo.axis2.execute)
execute:22, EchoTest (at.dsteindo.axis2.execute)
main:20, Registry (at.dsteindo.axis2.core)
{code}
I was then playing around with the debugger and at some point my IDE notified
me that I skipped a breakpoint
!screenshot-1.png!
Which is most likely the breakpoint I placed inside
org.apache.http.impl.conn.PoolingHttpClientConnectionManager#releaseConnection
Code
{code}
om.getParent().getBuilder().detach()
{code}
Then the next iteration I noticed that I had the connection available
!screenshot-2.png!
Comparision to when I did not play around while debugging and causing the
preakpoint skipped notification
!screenshot-3.png!
This might be an possible solution, but I am not sure if it might cause issues
with more deeply nested elements ...
Also concluded that axis2-jaxws-1.8.0.jar is the affected library, which makes
sense for jaxws integration :)
Hopefully this can help your team in figuring out a solution (on)
> Axis2 connections are not returned to connection pool on 1.8.0 with JAXWS
> -------------------------------------------------------------------------
>
> Key: AXIS2-6030
> URL: https://issues.apache.org/jira/browse/AXIS2-6030
> Project: Axis2
> Issue Type: Bug
> Components: transports
> Affects Versions: 1.8.0
> Reporter: David Steindorfer
> Assignee: Robert Lazarski
> Priority: Major
> Attachments: echoTestInterruptionException.txt, screenshot-1.png,
> screenshot-2.png, screenshot-3.png
>
>
> Good Afternoon,
>
> I have upgraded Axis2 from 1.7.9 to 1.8.0 on one of our projects.
> However with the upgrade the requests seem to get stuck.
> On further analysis I figured out that the connection pool ran dry as the
> connections were not returned.
>
> It took a while to reproduce the issue reliably and isolated from the other
> code of our project but under very similar circumstances.
> Thus I created a public git repo with the code I wrote to reproduce the issue:
> [https://github.com/dsteindo/Axis2Examples]
>
> I think the affected component is the "axis2-transport-http" library.
> For now I reverted the project's libraries back to 1.7.9.
> But it would be awesome to use the latest libraries, considering that you did
> quite a lot of changes and improvements :)
>
> Please feel free to contact me if more information is needed, but I guess
> that everything should be documented with the git repository.
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