osgi - Blocked threads due to ServiceRegistry -


i have relatively high volume/requests system in using osgi. close 800m requests per day.

we seeing issues threads getting blocked. every request comes in, forward event/data osgi bundle using registerservice pass payload/data osgi bundle listening service.

like this: bundlecontext.registerservice(map.class.getname(), dataholdermap, null);

where dataholdermap nothing regular java hashmap

here threaddump using jstack:

===========================================================================

"requestthread" prio=10 tid=0x00000000421ab800 nid=0x1042 runnable [0x00007fbdd3867000] java.lang.thread.state: runnable @ org.apache.felix.framework.serviceregistry.getservice(serviceregistry.java:295) - locked <0x0000000700e2c590> (a org.apache.felix.framework.serviceregistry) @ org.apache.felix.framework.felix.getservice(felix.java:3568) @ org.apache.felix.framework.bundlecontextimpl.getservice(bundlecontextimpl.java:468) @ org.osgi.util.tracker.servicetracker.addingservice(servicetracker.java:411) @ org.osgi.util.tracker.servicetracker$tracked.customizeradding(servicetracker.java:932) @ org.osgi.util.tracker.servicetracker$tracked.customizeradding(servicetracker.java:864) @ org.osgi.util.tracker.abstracttracked.trackadding(abstracttracked.java:256) @ org.osgi.util.tracker.abstracttracked.track(abstracttracked.java:229) @ org.osgi.util.tracker.servicetracker$tracked.servicechanged(servicetracker.java:894) @ org.apache.felix.framework.util.eventdispatcher.invokeservicelistenercallback(eventdispatcher.java:932) @ org.apache.felix.framework.util.eventdispatcher.fireeventimmediately(eventdispatcher.java:793) @ org.apache.felix.framework.util.eventdispatcher.fireserviceevent(eventdispatcher.java:543) @ org.apache.felix.framework.felix.fireserviceevent(felix.java:4419) @ org.apache.felix.framework.felix.registerservice(felix.java:3423) @ org.apache.felix.framework.bundlecontextimpl.registerservice(bundlecontextimpl.java:346) @ org.apache.felix.framework.bundlecontextimpl.registerservice(bundlecontextimpl.java:320) @ com.mypackage.person.bs.processor.processor.sendevent(processor.java:56) @ com.mypackage.jetmystream.event.support.abstracteventsource.firesendevent(abstracteventsource.java:97) @ com.mypackage.jetmystream.event.channel.messaging.inboundmessagingchannel.fireevent(inboundmessagingchannel.java:113) @ com.mypackage.jetmystream.event.channel.messaging.inboundmessagingchannel.onmessage(inboundmessagingchannel.java:204) @ com.mypackage.jetmystream.messaging.messageservice.dispatchmessageforcontext(messageservice.java:349) @ com.mypackage.jetmystream.messaging.messageservice.dispatch(messageservice.java:259) @ com.mypackage.jetmystream.messaging.messageservicerequest.execute(messageservicerequest.java:40) @ com.mypackage.jetmystream.util.requestthread.run(requestthread.java:69)

"requestthread" prio=10 tid=0x00000000425f8800 nid=0x1041 waiting monitor entry [0x00007fbdd3968000] java.lang.thread.state: blocked (on object monitor) @ org.apache.felix.framework.serviceregistry.registerservice(serviceregistry.java:109) - waiting lock <0x0000000700e2c590> (a org.apache.felix.framework.serviceregistry) @ org.apache.felix.framework.felix.registerservice(felix.java:3393) @ org.apache.felix.framework.bundlecontextimpl.registerservice(bundlecontextimpl.java:346) @ org.apache.felix.framework.bundlecontextimpl.registerservice(bundlecontextimpl.java:320) @ com.mypackage.person.bs.processor.processor.sendevent(bullseyemodelprocessor.java:56) @ com.mypackage.jetmystream.event.support.abstracteventsource.firesendevent(abstracteventsource.java:97) @ com.mypackage.jetmystream.event.channel.messaging.inboundmessagingchannel.fireevent(inboundmessagingchannel.java:113) @ com.mypackage.jetmystream.event.channel.messaging.inboundmessagingchannel.onmessage(inboundmessagingchannel.java:204) @ com.mypackage.jetmystream.messaging.messageservice.dispatchmessageforcontext(messageservice.java:349) @ com.mypackage.jetmystream.messaging.messageservice.dispatch(messageservice.java:259) @ com.mypackage.jetmystream.messaging.messageservicerequest.execute(messageservicerequest.java:40)

@ com.mypackage.jetmystream.util.requestthread.run(requestthread.java:69)

a couple of question on this:

  1. am doing wrong in sending map through registerservice. if alternatives?

  2. any ideas on how can work? have 26 nodes , need process 400 requests per second using mechanism

    anyone had similar issues? pointers highly appreciated

thanks masti

"am doing wrong in sending map through registerservice. if alternatives?"

yes! service registry not intended used way; not messaging bus.

as alternatives... why not use messaging bus? @ osgi event admin there many other implementations of idea.

"any ideas on how can work? have 26 nodes , need process 400 requests per second using mechanism"

you have bit more specific you're trying achieve. question abstract. please describe messages coming from, need delivered, processing (if any) need in middle, etc.


-

Comments

Post a Comment

Popular posts from this blog

php - regexp cyrillic filename not matches -

i take list of files php glob(."*.pdf") . files have cyrillic names. example: ООО «Рога и копыта» then load company names database , try find them in file names: preg_match("/$firm_name/ui", $file_name, $match); i have problem: firms if $firm_name visually similar $file_name , preg_match says there no match. mb_detect_encoding both variables return utf-8. there problem in file name, or maybe there encoding or something, can not understand, ask help. upd: $file_name='ООО «Рога и копыта»'; preg_match("/... .Рога и копыта./ui", $file_name, $match); as result, ОО «Рога и копыта» , 1 О missing
Read more

c# - OpenXML hanging while writing elements -

Image
i have program pulls data database, caches file , exports data multiple formats (excel, excel 2003, csv). i'm using openxml sdk 2.0 excel work. these export processes run in parallel (using parallel.foreach ), , amount of data can pretty large - e.g. csvs 800mb. during these larger exports, i've noticed writing of xml documents hang. instance, if have 8 exporting in parallel, @ point "pause". hang around same point: //this.writer openxmlwriter created worksheetpart. this.writer.writeelement(new cell() { cellvalue = new cellvalue(value), datatype = cellvalues.string }); when happens, pause debugger (vs2013 in case) , notice threads blocking around same portion of code - bit deeper in openxml sdk - stem call openxmlwriter.writeelement . i dug through source using justdecompile didn't find answers. appears there intermediary stream in use writing isolated storage , is, reason, blocking. underlying stream each of these filestream . here screenshot ...
Read more

sql - Select Query has unexpected multiple records (MS Access) -

i may tired, can't seem figure out happening. have 2 queries. query 1 has 10 fields. query 2 has 5 fields. fields 1 through 3 same in both queries. trying write select query , simple add field 5 query2 query1 result should query1 additional field (query2.field5). i join first 3 fields both queries , choose select records in query1 , in query2 match. don't know sql, use query designer. expect same number of records have query 1 instead have 3 times or more. can tell me doing wrong. tried reversing joins still seem same records. thanks in advance. here query: the fields in common divisionname , supplierid = vendorid , commodityname . select [part revenue exposed query p1].divisionname, [part revenue exposed query p1].commodityname, [part revenue exposed query p1].suppliername, [part revenue exposed query p1].partnumber, [part revenue exposed query p1].partdescription, [part revenue exposed query p1].bucode, ...
Read more