Hmmm... not too sure, if i understand correctly from the stack traces in
the original post the original version of the xsd parser (the "dzwiers"
parser) is being used?
I did just recently fix an issue with deadlocks with the new parser... but
that was geoserver specific.
On Wed, Feb 8, 2012 at 8:39 PM, Ben Caradoc-Davies
<[email protected]> wrote:
> Norman,
>
> app-schema-resolver is meant to be used with AppSchemaConfiguration for
> schemas that are not known at compile time. Most XML Configuration
> instances (those with compiled Java bindings) are meant to use internal
> means to resolve dependencies from jar files. I do not know why this is not
> happening in your case.
>
> Justin is our resident XML guru (and module maintainer); Justin, can you
> suggest why Norman is seeing network requests for schemas? I do not think
> he has any app-schema dependencies.
>
> Could a missing schema cause the EMF to seek it on the network?
>
> Kind regards,
> Ben.
>
>
> On 07/02/12 17:26, NORMAN MANN wrote:
>
>> Hi Ben,
>> I really appreciate your repsonse.
>>
>> I have been looking into app-schema-resolver quite a bit yesterday.
>> However , I couldn't understand what I need to do with the Configuration
>> object? Do I need to set it somewhere, for it to be picked up?
>>
>> I kind of came to the conclusion yesterday, that it's only designed to be
>> used "internally" when you have access to the Parser?
>>
>> For my usage, I am using a WebMapServer object which makes the getCaps
>> request etc. However, this depends on other scheams (inspire, XML) and will
>> download those.
>> This isn't a huge problem per say, but the W3.org schema sometimes takes
>> a very long time to download and causes the contention issue I demonstrated
>> below.
>> I would much prefer to load them locally from the disk. To the W3 end, I
>> did notice that you may have packaged up that schema already ?
>>
>> <dependency>
>> <groupId>org.geotools.schemas<**/groupId>
>> <artifactId>xml-1.0</**artifactId>
>> <version>1.0.0-3</version>
>> </dependency>
>>
>> I did add that to my Pom, but I don't think it made any difference. But,
>> I guess that's back to my Configuration object question, what do I need to
>> do with it for it to be picked up?
>> I did also take a look at the AppSchemaResolver tests, but that uses
>> Schemas.findSchemas(**configuration) to check the configuration works,
>> as opposed to setting it in a context or whatever, Unless that's enough? I
>> was looking in the Schema/DocumentFactory source code and couldn't see
>> where they would pick up a Configuration object.
>>
>> Anymore help very much appreciated.
>>
>> Thanks
>>
>> Norman
>>
>> From: Ben Caradoc-Davies<Ben.Caradoc-**[email protected]>
>> To: NORMAN MANN<[email protected]**>
>>
>> Cc: Jody Garnett<[email protected]**>; "geotools-gt2-users@lists.**
>> sourceforge.net <[email protected]>"<geotools-gt2-
>> **[email protected] <[email protected]>>
>> Sent: Tuesday, 7 February 2012, 4:51
>> Subject: Re: [Geotools-gt2-users] Dead lock? Or caching XMLs chemas?
>>
>> Norman,
>>
>> app-schema-resolver is designed to download and cache external published
>> application schemas and their dependencies. It will only download the
>> schemas that the XML infrastructure needs (on demand). See the javadocs
>> and also:
>> http://docs.geotools.org/**latest/userguide/extension/**
>> app-schema.html#application-**schema-resolver<http://docs.geotools.org/latest/userguide/extension/app-schema.html#application-schema-resolver>
>>
>> The app-schema-packages module shows how to bundle published schemas
>> into maven artifacts (jar files) suitable for use with
>> app-schema-resolver.
>>
>> Kind regards,
>> Ben.
>>
>>
>> On 06/02/12 16:57, NORMAN MANN wrote:
>>
>>> Thanks Jody, appreciate your help.
>>> Could you point me in the direction of which part of the source code?
>>> I have been looking at SchemaFactory.loadSchemas which I don't think is
>>> what I need.
>>> I have also been looking at app-schema-resolver which looks like more
>>> what I need, however, I am not sure how to set this globally (if possible?).
>>>
>>> Thanks in advance,
>>>
>>> Norman
>>>
>>>
>>> From: Jody Garnett<[email protected]**<mailto:
>>> [email protected]**>>
>>> To: NORMAN MANN<[email protected]**<mailto:
>>> normanmann@btinternet.**com <[email protected]>>>
>>> Cc:
>>> "geotools-gt2-users@lists.**sourceforge.net<[email protected]>
>>> <mailto:geotool**[email protected].**net<[email protected]>
>>> >"<geotools-gt2-users@**lists.sourceforge.net<[email protected]>
>>> <mailto:g**eotools-gt2-users@lists.**sourceforge.net<[email protected]>
>>> >>
>>>
>>> Sent: Sunday, 5 February 2012, 10:23
>>> Subject: Re: [Geotools-gt2-users] Dead lock? Or caching XMLs chemas?
>>>
>>> You should package well known schemas as jars and contribute them into
>>> the mix. This is used when the source of the Schema is unavailable; or
>>> if your app is behind a fire wall. See the source code for examples of
>>> the OGC schemas handled this way.
>>>
>>> --
>>> Jody Garnett
>>>
>>> On 05/02/2012, at 5:52 PM, NORMAN MANN<[email protected]**
>>> <mailto:normanmann@btinternet.**com <[email protected]>><mailto:
>>> normanmann@**btinternet.com <[email protected]><mailto:normanma*
>>> *[email protected] <[email protected]>>>> wrote:
>>>
>>>
>>>>
>>>> Anyone?
>>>> Any advice would really be appreciated.
>>>>
>>>> Especially on storing schemas locally as this may well avoid the
>>>> contention .
>>>>
>>>> Thanks
>>>>
>>>> Norman
>>>>
>>>> ------------------------------
>>>> On Fri, Feb 3, 2012 3:26 PM GMT NORMAN MANN wrote:
>>>>
>>>> Hi All,
>>>>>
>>>>> I am using geotools to generate images based on a remote WMS, and a
>>>>> local WFS.
>>>>> To increase throughput, I am attempted to make the software
>>>>> multithreaded (in a non application server environment).
>>>>> However I think I am getting deadlock (well maybe not deadlock, but
>>>>> the threads seem to be stuck waiting for one of the threads waiting to
>>>>> download XML schemas over the internet).
>>>>>
>>>>> On initial startup of WebMapServer object (each thread keeps it's own
>>>>> instance of a WebMapServer for performance - downloading XML schemas in
>>>>> particularly time consuming) it seems to download lots of XML schemas from
>>>>> the getCapabilities document for the WMS.
>>>>>
>>>>> Ideally I would like to cache these on the file system, is this
>>>>> possible, if so how? This may alleviate the problem in terms of time (it
>>>>> seems to take a long time) taken to download the various XML schemas. But
>>>>> would be preferential anyway to reduce startup time.
>>>>>
>>>>> Secondly each WebMapServer object seems to be waiting on a lock on
>>>>> org.geotools.xml.**SchemaFactory.getInstance which is locked by one
>>>>> of the WebMapServer objects.
>>>>> Does this have to be the case, or can I remove this area as a bottle
>>>>> neck? Is this is a bug? I can see that SchemaFactory.getInstance seems to
>>>>> be intended to be thread safe.
>>>>>
>>>>> I have pasted the stack of some of the example threads below, and any
>>>>> help/advice would be very much appreciated!!
>>>>>
>>>>> Thanks
>>>>>
>>>>> Norman
>>>>>
>>>>>
>>>>> THREAD with LOCK
>>>>>
>>>>> "Piper Processor 3" prio=1 tid=0x0966e9d0 nid=0x3b4f runnable
>>>>> [0xe7c8f000..0xe7c90130]
>>>>> at java.net.SocketInputStream.**socketRead0(Native Method)
>>>>> at java.net.SocketInputStream.**read(SocketInputStream.java:**
>>>>> 129)
>>>>> at java.io.BufferedInputStream.**fill(BufferedInputStream.java:
>>>>> **218)
>>>>> at java.io.BufferedInputStream.**read1(BufferedInputStream.**
>>>>> java:256)
>>>>> at java.io.BufferedInputStream.**read(BufferedInputStream.java:
>>>>> **313)
>>>>> - locked<0xeabe3e70> (a java.io.BufferedInputStream)
>>>>> at sun.net.www.http.HttpClient.**parseHTTPHeader(HttpClient.**
>>>>> java:606)
>>>>> at sun.net.www.http.HttpClient.**parseHTTP(HttpClient.java:554)
>>>>> at sun.net.www.protocol.http.**HttpURLConnection.**
>>>>> getInputStream(**HttpURLConnection.java:936)
>>>>> - locked<0xeabe2480> (a sun.net.www.protocol.http.**
>>>>> HttpURLConnection)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLEntityManager.**setupCurrentEntity(Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLVersionDetector.**determineDocVersion(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XMLParser.parse(Unknown Source)
>>>>> at org.apache.xerces.parsers.**AbstractSAXParser.parse(**Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.jaxp.**SAXParserImpl$JAXPSAXParser.**parse(Unknown
>>>>> Source)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:375)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:255)
>>>>> at org.geotools.xml.**SchemaFactory.getRealInstance(**
>>>>> SchemaFactory.java:305)
>>>>> - locked<0xeb52acf0> (a org.geotools.xml.**SchemaFactory)
>>>>> at org.geotools.xml.**SchemaFactory.getInstance(**
>>>>> SchemaFactory.java:265)
>>>>> - locked<0xef884168> (a java.lang.Class)
>>>>> at org.geotools.xml.handlers.xsi.**SchemaHandler.compress(**
>>>>> SchemaHandler.java:430)
>>>>> at org.geotools.xml.handlers.xsi.**RootHandler.getSchema(**
>>>>> RootHandler.java:117)
>>>>> at org.geotools.xml.**XSISAXHandler.getSchema(**
>>>>> XSISAXHandler.java:257)
>>>>> at org.geotools.xml.**SchemaFactory.getRealInstance(**
>>>>> SchemaFactory.java:310)
>>>>> - locked<0xeb52acf0> (a org.geotools.xml.**SchemaFactory)
>>>>> at org.geotools.xml.**SchemaFactory.getInstance(**
>>>>> SchemaFactory.java:265)
>>>>> - locked<0xef884168> (a java.lang.Class)
>>>>> at org.geotools.xml.handlers.xsi.**SchemaHandler.compress(**
>>>>> SchemaHandler.java:385)
>>>>> at org.geotools.xml.handlers.xsi.**RootHandler.getSchema(**
>>>>> RootHandler.java:117)
>>>>> at org.geotools.xml.**XSISAXHandler.getSchema(**
>>>>> XSISAXHandler.java:257)
>>>>> at org.geotools.xml.**SchemaFactory.getRealInstance(**
>>>>> SchemaFactory.java:310)
>>>>> - locked<0xeb52acf0> (a org.geotools.xml.**SchemaFactory)
>>>>> at org.geotools.xml.**SchemaFactory.getInstance(**
>>>>> SchemaFactory.java:265)
>>>>> - locked<0xef884168> (a java.lang.Class)
>>>>> at org.geotools.xml.handlers.xsi.**SchemaHandler.compress(**
>>>>> SchemaHandler.java:430)
>>>>> at org.geotools.xml.handlers.xsi.**RootHandler.getSchema(**
>>>>> RootHandler.java:117)
>>>>> at org.geotools.xml.**XSISAXHandler.getSchema(**
>>>>> XSISAXHandler.java:257)
>>>>> at org.geotools.xml.**SchemaFactory.getRealInstance(**
>>>>> SchemaFactory.java:310)
>>>>> - locked<0xeb52acf0> (a org.geotools.xml.**SchemaFactory)
>>>>> at org.geotools.xml.**SchemaFactory.getInstance(**
>>>>> SchemaFactory.java:265)
>>>>> - locked<0xef884168> (a java.lang.Class)
>>>>> at org.geotools.xml.handlers.**ElementHandlerFactory.**
>>>>> startPrefixMapping(**ElementHandlerFactory.java:87)
>>>>> at org.geotools.xml.**XMLSAXHandler.startElement(**
>>>>> XMLSAXHandler.java:370)
>>>>> at
>>>>> org.apache.xerces.parsers.**AbstractSAXParser.**startElement(Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLNSDocumentScannerImpl.**scanStartElement(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.impl.**XMLNSDocumentScannerImpl$**
>>>>> NSContentDispatcher.**scanRootElementHook(Unknown Source)
>>>>> at org.apache.xerces.impl.**XMLDocumentFragmentScannerImpl**
>>>>> $FragmentContentDispatcher.**dispatch(Unknown Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLDocumentFragmentScannerImpl**.scanDocument(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XMLParser.parse(Unknown Source)
>>>>> at org.apache.xerces.parsers.**AbstractSAXParser.parse(**Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.jaxp.**SAXParserImpl$JAXPSAXParser.**parse(Unknown
>>>>> Source)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:375)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:176)
>>>>> at org.geotools.xml.**DocumentFactory.getInstance(**
>>>>> DocumentFactory.java:133)
>>>>> at org.geotools.data.wms.**response.**
>>>>> WMSGetCapabilitiesResponse.<**init>(**WMSGetCapabilitiesResponse.**
>>>>> java:54)
>>>>> at org.geotools.data.wms.WMS1_0_**0$GetCapsRequest.**
>>>>> createResponse(WMS1_0_0.java:**231)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.**
>>>>> internalIssueRequest(**AbstractOpenWebService.java:**440)
>>>>> at org.geotools.data.wms.**WebMapServer.issueRequest(**
>>>>> WebMapServer.java:405)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.**
>>>>> negotiateVersion(**AbstractOpenWebService.java:**240)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.<init>(**
>>>>> AbstractOpenWebService.java:**95)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.<init>(**
>>>>> AbstractOpenWebService.java:**81)
>>>>> at org.geotools.data.wms.**WebMapServer.<init>(**
>>>>> WebMapServer.java:368)
>>>>>
>>>>>
>>>>> THREADS without lock....
>>>>> "Piper Processor 2" prio=1 tid=0x0964bf50 nid=0x3b4e waiting for
>>>>> monitor entry [0xe7d10000..0xe7d10fb0]
>>>>> at org.geotools.xml.**SchemaFactory.getInstance(**
>>>>> SchemaFactory.java:265)
>>>>> - waiting to lock<0xef884168> (a java.lang.Class)
>>>>> at org.geotools.xml.handlers.**ElementHandlerFactory.**
>>>>> startPrefixMapping(**ElementHandlerFactory.java:87)
>>>>> at org.geotools.xml.**XMLSAXHandler.startElement(**
>>>>> XMLSAXHandler.java:370)
>>>>> at
>>>>> org.apache.xerces.parsers.**AbstractSAXParser.**startElement(Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLNSDocumentScannerImpl.**scanStartElement(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.impl.**XMLNSDocumentScannerImpl$**
>>>>> NSContentDispatcher.**scanRootElementHook(Unknown Source)
>>>>> at org.apache.xerces.impl.**XMLDocumentFragmentScannerImpl**
>>>>> $FragmentContentDispatcher.**dispatch(Unknown Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLDocumentFragmentScannerImpl**.scanDocument(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XMLParser.parse(Unknown Source)
>>>>> at org.apache.xerces.parsers.**AbstractSAXParser.parse(**Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.jaxp.**SAXParserImpl$JAXPSAXParser.**parse(Unknown
>>>>> Source)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:375)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:176)
>>>>> at org.geotools.xml.**DocumentFactory.getInstance(**
>>>>> DocumentFactory.java:133)
>>>>> at org.geotools.data.wms.**response.**
>>>>> WMSGetCapabilitiesResponse.<**init>(**WMSGetCapabilitiesResponse.**
>>>>> java:54)
>>>>> at org.geotools.data.wms.WMS1_0_**0$GetCapsRequest.**
>>>>> createResponse(WMS1_0_0.java:**231)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.**
>>>>> internalIssueRequest(**AbstractOpenWebService.java:**440)
>>>>> at org.geotools.data.wms.**WebMapServer.issueRequest(**
>>>>> WebMapServer.java:405)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.**
>>>>> negotiateVersion(**AbstractOpenWebService.java:**240)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.<init>(**
>>>>> AbstractOpenWebService.java:**95)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.<init>(**
>>>>> AbstractOpenWebService.java:**81)
>>>>> at org.geotools.data.wms.**WebMapServer.<init>(**
>>>>> WebMapServer.java:368)
>>>>>
>>>>> "Piper Processor 1" prio=1 tid=0x0964bdc8 nid=0x3b4d waiting for
>>>>> monitor entry [0xe7d91000..0xe7d92030]
>>>>> at org.geotools.xml.**SchemaFactory.getInstance(**
>>>>> SchemaFactory.java:208)
>>>>> - waiting to lock<0xef884168> (a java.lang.Class)
>>>>> at org.geotools.xml.handlers.**ElementHandlerFactory.**
>>>>> startPrefixMapping(**ElementHandlerFactory.java:**115)
>>>>> at org.geotools.xml.**XMLSAXHandler.startElement(**
>>>>> XMLSAXHandler.java:383)
>>>>> at
>>>>> org.apache.xerces.parsers.**AbstractSAXParser.**startElement(Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.parsers.**AbstractXMLDocumentParser.**emptyElement(Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLNSDocumentScannerImpl.**scanStartElement(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.impl.**XMLDocumentFragmentScannerImpl**
>>>>> $FragmentContentDispatcher.**dispatch(Unknown Source)
>>>>> at
>>>>> org.apache.xerces.impl.**XMLDocumentFragmentScannerImpl**.scanDocument(Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XML11Configuration.parse(**Unknown
>>>>> Source)
>>>>> at org.apache.xerces.parsers.**XMLParser.parse(Unknown Source)
>>>>> at org.apache.xerces.parsers.**AbstractSAXParser.parse(**Unknown
>>>>> Source)
>>>>> at
>>>>> org.apache.xerces.jaxp.**SAXParserImpl$JAXPSAXParser.**parse(Unknown
>>>>> Source)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:375)
>>>>> at javax.xml.parsers.SAXParser.**parse(SAXParser.java:176)
>>>>> at org.geotools.xml.**DocumentFactory.getInstance(**
>>>>> DocumentFactory.java:133)
>>>>> at org.geotools.data.wms.**response.**
>>>>> WMSGetCapabilitiesResponse.<**init>(**WMSGetCapabilitiesResponse.**
>>>>> java:54)
>>>>> at org.geotools.data.wms.WMS1_0_**0$GetCapsRequest.**
>>>>> createResponse(WMS1_0_0.java:**231)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.**
>>>>> internalIssueRequest(**AbstractOpenWebService.java:**440)
>>>>> at org.geotools.data.wms.**WebMapServer.issueRequest(**
>>>>> WebMapServer.java:405)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.**
>>>>> negotiateVersion(**AbstractOpenWebService.java:**240)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.<init>(**
>>>>> AbstractOpenWebService.java:**95)
>>>>> at org.geotools.data.ows.**AbstractOpenWebService.<init>(**
>>>>> AbstractOpenWebService.java:**81)
>>>>> at org.geotools.data.wms.**WebMapServer.<init>(**
>>>>> WebMapServer.java:368)
>>>>> at com.bt.mbe.processing.**PIPERProcessor.getWMSLayer(**
>>>>> PIPERProcessor.java:369)
>>>>> at com.bt.mbe.processing.**PIPERProcessor.processItem(**
>>>>> PIPERProcessor.java:269)
>>>>> at com.bt.mbe.processing.**PIPERProcessor.run(**
>>>>> PIPERProcessor.java:211)
>>>>> at java.lang.Thread.run(Thread.**java:595)
>>>>>
>>>>
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>>>> ______________________________**_________________
>>>> GeoTools-GT2-Users mailing list
>>>> GeoTools-GT2-Users@lists.**sourceforge.net<[email protected]>
>>>> <mailto:GeoTool**[email protected].**net<[email protected]>
>>>> ><mailto:GeoTools-GT2-**[email protected]<[email protected]>
>>>> <**mailto:GeoTools-GT2-Users@**lists.sourceforge.net<[email protected]>
>>>> >>
>>>> https://lists.sourceforge.net/**lists/listinfo/geotools-gt2-**users<https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users>
>>>>
>>>
>>>
>>>
>>>
>> --
>> Ben Caradoc-Davies<Ben.Caradoc-**[email protected]<mailto:Ben.**
>> [email protected] <[email protected]>>>
>>
>> Software Engineer
>> CSIRO Earth Science and Resource Engineering
>> Australian Resources Research Centre
>>
>>
>>
>>
> --
> Ben Caradoc-Davies <[email protected]>
> Software Engineer
> CSIRO Earth Science and Resource Engineering
> Australian Resources Research Centre
>
--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.
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