Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Rob, You are right I will merge the changes committed to fix QPID-8223 into 7.0.x as well. Alex On 7 August 2018 at 10:53, Rob Godfrey wrote: > Thanks Alex...are you planning on putting QPID-8223 in that too... I'm sure > Mike doesn't care about that one, but I do :-) > > -- Rob > > On Tue, 7 Aug 2018, 10:44 Oleksandr Rudyy, wrote: > >> Hi Mike, >> >> I will merge Rob's fix into 7.0.x branch for inclusion into 7.0.7 release. >> >> Kind Regards, >> Alex >> >> On 6 August 2018 at 20:03, Dyslin, Mike wrote: >> > Rob, >> > >> > I'm running with your fixed jar file now, and passed the 4GB boundary, >> currently at 5.11 GB, so your fix seems to work! >> > >> > Thanks so much for your quick response! We really appreciate it. >> > >> > We will watch for the next release that has this fix in it. Do you >> think it will be in 7.0.7? >> > >> > Thanks, >> > Mike >> > >> > >> > -Original Message- >> > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] >> > Sent: Monday, August 6, 2018 10:25 AM >> > To: users@qpid.apache.org >> > Cc: Mears, David B ; Herren, Elaine < >> elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > >> > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer >> messages after 4 GB data transfer >> > >> > Hi Mike, >> > On Mon, 6 Aug 2018 at 18:23, Dyslin, Mike wrote: >> > >> >> Rob, >> >> >> >> I created JIRA QPID-8225 with Title "Java Broker (7.0.6) stops >> >> delivering queue/consumer messages after 4 GB data transfer". >> >> >> >> The log you requested is attached to the JIRA. >> >> >> >> The log contains the connection startup, 10 messages flowing (2 every >> >> 10 seconds), then connection close. It does not contain when message >> >> flow stopped (credit exhausted?). I can get that for you if you like. >> >> >> >> We did see this in the log: >> >> >> >> 2018-08-06 07:57:34,100 DEBUG [IO-/15.252.32.148:43266] >> >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 >> >> MessageSetFlowMode(destination=dsaqp15, flowMode=CREDIT) >> >> 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] >> >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 >> >> MessageFlow(destination=dsaqp15, unit=MESSAGE, value=4294967295) >> >> 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] >> >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 >> >> MessageFlow(destination=dsaqp15, unit=BYTE, value=4294967295) >> >> >> >> And we never saw anything that looked like credit was being reset by >> >> the consumer. >> >> >> >> >> > OK - this actually matches up with what I suspected looking more deeply >> at the code this morning. The value 4294967295 is supposed to be a magic >> number meaning "infinite" credit, however the Java Broker is mishandling >> this, expecting it to be passed as -1, whereas in fact a lower layer in the >> code is instead passing the value as 4294967295 in a signed 64bit value. I >> just committed a fix to master, but I'm not sure when that might be >> released as a new version. >> > >> > >> >> So, perhaps the 4 GB credit simply is all used up and messages stop >> >> flowing. >> >> >> >> How do we change FlowMode to OFF, or if that is not possible, how do >> >> we reset our credit back to 4 GB in the QPID C++ API? >> >> >> >> >> > So, I'm not familiar with the C++ API, if there were an obvious way to >> switch from "credit" mode to "window" mode (which is the protocol default) >> then that would likely work around the problem. >> > >> > >> >> Since we don't see any of our code setting any kind of flow control >> >> option, is the C++ API sending flow control default setting to the >> >> broker, or is the broker setting flow control default because the >> >> producer has not specified any flow control? If the latter, then >> >> perhaps the C++ and Java brokers have different flow control defaults. >> >> If the former, then C++ broker and the java broker are not >> >> implementing specified the flow control in the same way. >> >> >> >> Again, our original code was only tested with C++
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Thanks Alex...are you planning on putting QPID-8223 in that too... I'm sure Mike doesn't care about that one, but I do :-) -- Rob On Tue, 7 Aug 2018, 10:44 Oleksandr Rudyy, wrote: > Hi Mike, > > I will merge Rob's fix into 7.0.x branch for inclusion into 7.0.7 release. > > Kind Regards, > Alex > > On 6 August 2018 at 20:03, Dyslin, Mike wrote: > > Rob, > > > > I'm running with your fixed jar file now, and passed the 4GB boundary, > currently at 5.11 GB, so your fix seems to work! > > > > Thanks so much for your quick response! We really appreciate it. > > > > We will watch for the next release that has this fix in it. Do you > think it will be in 7.0.7? > > > > Thanks, > > Mike > > > > > > -Original Message- > > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > > Sent: Monday, August 6, 2018 10:25 AM > > To: users@qpid.apache.org > > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer > messages after 4 GB data transfer > > > > Hi Mike, > > On Mon, 6 Aug 2018 at 18:23, Dyslin, Mike wrote: > > > >> Rob, > >> > >> I created JIRA QPID-8225 with Title "Java Broker (7.0.6) stops > >> delivering queue/consumer messages after 4 GB data transfer". > >> > >> The log you requested is attached to the JIRA. > >> > >> The log contains the connection startup, 10 messages flowing (2 every > >> 10 seconds), then connection close. It does not contain when message > >> flow stopped (credit exhausted?). I can get that for you if you like. > >> > >> We did see this in the log: > >> > >> 2018-08-06 07:57:34,100 DEBUG [IO-/15.252.32.148:43266] > >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > >> MessageSetFlowMode(destination=dsaqp15, flowMode=CREDIT) > >> 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] > >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > >> MessageFlow(destination=dsaqp15, unit=MESSAGE, value=4294967295) > >> 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] > >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > >> MessageFlow(destination=dsaqp15, unit=BYTE, value=4294967295) > >> > >> And we never saw anything that looked like credit was being reset by > >> the consumer. > >> > >> > > OK - this actually matches up with what I suspected looking more deeply > at the code this morning. The value 4294967295 is supposed to be a magic > number meaning "infinite" credit, however the Java Broker is mishandling > this, expecting it to be passed as -1, whereas in fact a lower layer in the > code is instead passing the value as 4294967295 in a signed 64bit value. I > just committed a fix to master, but I'm not sure when that might be > released as a new version. > > > > > >> So, perhaps the 4 GB credit simply is all used up and messages stop > >> flowing. > >> > >> How do we change FlowMode to OFF, or if that is not possible, how do > >> we reset our credit back to 4 GB in the QPID C++ API? > >> > >> > > So, I'm not familiar with the C++ API, if there were an obvious way to > switch from "credit" mode to "window" mode (which is the protocol default) > then that would likely work around the problem. > > > > > >> Since we don't see any of our code setting any kind of flow control > >> option, is the C++ API sending flow control default setting to the > >> broker, or is the broker setting flow control default because the > >> producer has not specified any flow control? If the latter, then > >> perhaps the C++ and Java brokers have different flow control defaults. > >> If the former, then C++ broker and the java broker are not > >> implementing specified the flow control in the same way. > >> > >> Again, our original code was only tested with C++ brokers. > >> > >> > > Yeah - sadly this is a Java Broker bug you've discovered. I've uploaded > a jar file with the proposed fix into the JIRA (just replace the existing > jar of the same name in lib/broker-plugins). Alternatively you can build > this yourself by doing the following: > > > > git clone https://git-wip-us.apache.org/repos/asf/qpid-broker-j.git > > > > cd qpid-broker-j/ > > > > git checkout 7.0.6 > > > > git cherry-pick cf40fdea39d9633702ee
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Hi Mike, I will merge Rob's fix into 7.0.x branch for inclusion into 7.0.7 release. Kind Regards, Alex On 6 August 2018 at 20:03, Dyslin, Mike wrote: > Rob, > > I'm running with your fixed jar file now, and passed the 4GB boundary, > currently at 5.11 GB, so your fix seems to work! > > Thanks so much for your quick response! We really appreciate it. > > We will watch for the next release that has this fix in it. Do you think it > will be in 7.0.7? > > Thanks, > Mike > > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Monday, August 6, 2018 10:25 AM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine > ; Rao, Shobha (NonStop) > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages > after 4 GB data transfer > > Hi Mike, > On Mon, 6 Aug 2018 at 18:23, Dyslin, Mike wrote: > >> Rob, >> >> I created JIRA QPID-8225 with Title "Java Broker (7.0.6) stops >> delivering queue/consumer messages after 4 GB data transfer". >> >> The log you requested is attached to the JIRA. >> >> The log contains the connection startup, 10 messages flowing (2 every >> 10 seconds), then connection close. It does not contain when message >> flow stopped (credit exhausted?). I can get that for you if you like. >> >> We did see this in the log: >> >> 2018-08-06 07:57:34,100 DEBUG [IO-/15.252.32.148:43266] >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 >> MessageSetFlowMode(destination=dsaqp15, flowMode=CREDIT) >> 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 >> MessageFlow(destination=dsaqp15, unit=MESSAGE, value=4294967295) >> 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] >> (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 >> MessageFlow(destination=dsaqp15, unit=BYTE, value=4294967295) >> >> And we never saw anything that looked like credit was being reset by >> the consumer. >> >> > OK - this actually matches up with what I suspected looking more deeply at > the code this morning. The value 4294967295 is supposed to be a magic number > meaning "infinite" credit, however the Java Broker is mishandling this, > expecting it to be passed as -1, whereas in fact a lower layer in the code is > instead passing the value as 4294967295 in a signed 64bit value. I just > committed a fix to master, but I'm not sure when that might be released as a > new version. > > >> So, perhaps the 4 GB credit simply is all used up and messages stop >> flowing. >> >> How do we change FlowMode to OFF, or if that is not possible, how do >> we reset our credit back to 4 GB in the QPID C++ API? >> >> > So, I'm not familiar with the C++ API, if there were an obvious way to switch > from "credit" mode to "window" mode (which is the protocol default) then that > would likely work around the problem. > > >> Since we don't see any of our code setting any kind of flow control >> option, is the C++ API sending flow control default setting to the >> broker, or is the broker setting flow control default because the >> producer has not specified any flow control? If the latter, then >> perhaps the C++ and Java brokers have different flow control defaults. >> If the former, then C++ broker and the java broker are not >> implementing specified the flow control in the same way. >> >> Again, our original code was only tested with C++ brokers. >> >> > Yeah - sadly this is a Java Broker bug you've discovered. I've uploaded a > jar file with the proposed fix into the JIRA (just replace the existing jar > of the same name in lib/broker-plugins). Alternatively you can build this > yourself by doing the following: > > git clone https://git-wip-us.apache.org/repos/asf/qpid-broker-j.git > > cd qpid-broker-j/ > > git checkout 7.0.6 > > git cherry-pick cf40fdea39d9633702ee286d94e950a19ec7be74 > mvn package > > Apologies you've run into this :-( I think most clients are using window, > or non-infinite credit - that's the only reason I can think that this has not > been spotted before. > > If you give the jar a try and it works (or doesn't work) for you, please let > us know. > > -- Rob > > Thanks, >> Mike >> >> >> -Original Message- >> From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] >> Sent: Friday, August 3, 2018 3:34 PM >> To: users@qpid.apache.org >> Cc: Mears, David B ; Herren, Elaine < >> elaine.he
RE: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Rob, I'm running with your fixed jar file now, and passed the 4GB boundary, currently at 5.11 GB, so your fix seems to work! Thanks so much for your quick response! We really appreciate it. We will watch for the next release that has this fix in it. Do you think it will be in 7.0.7? Thanks, Mike -Original Message- From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] Sent: Monday, August 6, 2018 10:25 AM To: users@qpid.apache.org Cc: Mears, David B ; Herren, Elaine ; Rao, Shobha (NonStop) Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer Hi Mike, On Mon, 6 Aug 2018 at 18:23, Dyslin, Mike wrote: > Rob, > > I created JIRA QPID-8225 with Title "Java Broker (7.0.6) stops > delivering queue/consumer messages after 4 GB data transfer". > > The log you requested is attached to the JIRA. > > The log contains the connection startup, 10 messages flowing (2 every > 10 seconds), then connection close. It does not contain when message > flow stopped (credit exhausted?). I can get that for you if you like. > > We did see this in the log: > > 2018-08-06 07:57:34,100 DEBUG [IO-/15.252.32.148:43266] > (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > MessageSetFlowMode(destination=dsaqp15, flowMode=CREDIT) > 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] > (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > MessageFlow(destination=dsaqp15, unit=MESSAGE, value=4294967295) > 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] > (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > MessageFlow(destination=dsaqp15, unit=BYTE, value=4294967295) > > And we never saw anything that looked like credit was being reset by > the consumer. > > OK - this actually matches up with what I suspected looking more deeply at the code this morning. The value 4294967295 is supposed to be a magic number meaning "infinite" credit, however the Java Broker is mishandling this, expecting it to be passed as -1, whereas in fact a lower layer in the code is instead passing the value as 4294967295 in a signed 64bit value. I just committed a fix to master, but I'm not sure when that might be released as a new version. > So, perhaps the 4 GB credit simply is all used up and messages stop > flowing. > > How do we change FlowMode to OFF, or if that is not possible, how do > we reset our credit back to 4 GB in the QPID C++ API? > > So, I'm not familiar with the C++ API, if there were an obvious way to switch from "credit" mode to "window" mode (which is the protocol default) then that would likely work around the problem. > Since we don't see any of our code setting any kind of flow control > option, is the C++ API sending flow control default setting to the > broker, or is the broker setting flow control default because the > producer has not specified any flow control? If the latter, then > perhaps the C++ and Java brokers have different flow control defaults. > If the former, then C++ broker and the java broker are not > implementing specified the flow control in the same way. > > Again, our original code was only tested with C++ brokers. > > Yeah - sadly this is a Java Broker bug you've discovered. I've uploaded a jar file with the proposed fix into the JIRA (just replace the existing jar of the same name in lib/broker-plugins). Alternatively you can build this yourself by doing the following: git clone https://git-wip-us.apache.org/repos/asf/qpid-broker-j.git cd qpid-broker-j/ git checkout 7.0.6 git cherry-pick cf40fdea39d9633702ee286d94e950a19ec7be74 mvn package Apologies you've run into this :-( I think most clients are using window, or non-infinite credit - that's the only reason I can think that this has not been spotted before. If you give the jar a try and it works (or doesn't work) for you, please let us know. -- Rob Thanks, > Mike > > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Friday, August 3, 2018 3:34 PM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer > messages after 4 GB data transfer > > On Sat, 4 Aug 2018 at 00:11, Dyslin, Mike wrote: > > > Rob, > > > > We do not know how our consumer is managing credit, or anything > > about credit flow, but have started looking for information on this. > > It sounds like the right place to look. If we could figure out how > > to turn off the flow control limits, that may do it. We inherited > > most of this code, and the original authors of the code are long > &
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
On 06/08/18 18:25, Rob Godfrey wrote: So, I'm not familiar with the C++ API, if there were an obvious way to switch from "credit" mode to "window" mode (which is the protocol default) then that would likely work around the problem. Which API are you using? The recommended qpid::messaging API uses window mode except where capacity is set to 0 (in which case it uses credit mode and grants 1 message credit, within infinite byte credit on fetch). If you are using the old qpid::client API, that allows the flow control to be specified in the SubscriptionSettings. (The default appears to be infinite credit, which suggests that is indeed the API you are using). To alter that just pass a different value as the first parameter to SubscriptionSettings, e.g. FlowControl::messageWindow(1000) or whatever. - To unsubscribe, e-mail: users-unsubscr...@qpid.apache.org For additional commands, e-mail: users-h...@qpid.apache.org
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Hi Mike, On Mon, 6 Aug 2018 at 18:23, Dyslin, Mike wrote: > Rob, > > I created JIRA QPID-8225 with Title "Java Broker (7.0.6) stops delivering > queue/consumer messages after 4 GB data transfer". > > The log you requested is attached to the JIRA. > > The log contains the connection startup, 10 messages flowing (2 every 10 > seconds), then connection close. It does not contain when message flow > stopped (credit exhausted?). I can get that for you if you like. > > We did see this in the log: > > 2018-08-06 07:57:34,100 DEBUG [IO-/15.252.32.148:43266] > (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > MessageSetFlowMode(destination=dsaqp15, flowMode=CREDIT) > 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] > (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > MessageFlow(destination=dsaqp15, unit=MESSAGE, value=4294967295) > 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] > (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 > MessageFlow(destination=dsaqp15, unit=BYTE, value=4294967295) > > And we never saw anything that looked like credit was being reset by the > consumer. > > OK - this actually matches up with what I suspected looking more deeply at the code this morning. The value 4294967295 is supposed to be a magic number meaning "infinite" credit, however the Java Broker is mishandling this, expecting it to be passed as -1, whereas in fact a lower layer in the code is instead passing the value as 4294967295 in a signed 64bit value. I just committed a fix to master, but I'm not sure when that might be released as a new version. > So, perhaps the 4 GB credit simply is all used up and messages stop > flowing. > > How do we change FlowMode to OFF, or if that is not possible, how do we > reset our credit back to 4 GB in the QPID C++ API? > > So, I'm not familiar with the C++ API, if there were an obvious way to switch from "credit" mode to "window" mode (which is the protocol default) then that would likely work around the problem. > Since we don't see any of our code setting any kind of flow control > option, is the C++ API sending flow control default setting to the broker, > or is the broker setting flow control default because the producer has not > specified any flow control? If the latter, then perhaps the C++ and Java > brokers have different flow control defaults. If the former, then C++ > broker and the java broker are not implementing specified the flow control > in the same way. > > Again, our original code was only tested with C++ brokers. > > Yeah - sadly this is a Java Broker bug you've discovered. I've uploaded a jar file with the proposed fix into the JIRA (just replace the existing jar of the same name in lib/broker-plugins). Alternatively you can build this yourself by doing the following: git clone https://git-wip-us.apache.org/repos/asf/qpid-broker-j.git cd qpid-broker-j/ git checkout 7.0.6 git cherry-pick cf40fdea39d9633702ee286d94e950a19ec7be74 mvn package Apologies you've run into this :-( I think most clients are using window, or non-infinite credit - that's the only reason I can think that this has not been spotted before. If you give the jar a try and it works (or doesn't work) for you, please let us know. -- Rob Thanks, > Mike > > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Friday, August 3, 2018 3:34 PM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages > after 4 GB data transfer > > On Sat, 4 Aug 2018 at 00:11, Dyslin, Mike wrote: > > > Rob, > > > > We do not know how our consumer is managing credit, or anything about > > credit flow, but have started looking for information on this. It > > sounds like the right place to look. If we could figure out how to > > turn off the flow control limits, that may do it. We inherited most > > of this code, and the original authors of the code are long gone, so > > we don't have the experience of putting it all together. Perhaps the > > defaults for this credit flow is different between the C++ and Java > brokers. > > > > OK, we'll try to figure out how to get protocol logging turned on and > > get a log file to look at. > > > > Thanks - I had a quick look at the Java Broker code for managing credit > and didn't immediately see any obvious errors that would hit a properly > functioning client, *however* it does look like that if the client is > improperly managing credit there would be an overflow error where a value > that should be an unsigned integral va
RE: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Rob, I created JIRA QPID-8225 with Title "Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer". The log you requested is attached to the JIRA. The log contains the connection startup, 10 messages flowing (2 every 10 seconds), then connection close. It does not contain when message flow stopped (credit exhausted?). I can get that for you if you like. We did see this in the log: 2018-08-06 07:57:34,100 DEBUG [IO-/15.252.32.148:43266] (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 MessageSetFlowMode(destination=dsaqp15, flowMode=CREDIT) 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 MessageFlow(destination=dsaqp15, unit=MESSAGE, value=4294967295) 2018-08-06 07:57:34,102 DEBUG [IO-/15.252.32.148:43266] (o.a.q.s.p.v.ServerConnection) - RECV: [conn:6cd338b5] ch=1 MessageFlow(destination=dsaqp15, unit=BYTE, value=4294967295) And we never saw anything that looked like credit was being reset by the consumer. So, perhaps the 4 GB credit simply is all used up and messages stop flowing. How do we change FlowMode to OFF, or if that is not possible, how do we reset our credit back to 4 GB in the QPID C++ API? Since we don't see any of our code setting any kind of flow control option, is the C++ API sending flow control default setting to the broker, or is the broker setting flow control default because the producer has not specified any flow control? If the latter, then perhaps the C++ and Java brokers have different flow control defaults. If the former, then C++ broker and the java broker are not implementing specified the flow control in the same way. Again, our original code was only tested with C++ brokers. Thanks, Mike -Original Message- From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] Sent: Friday, August 3, 2018 3:34 PM To: users@qpid.apache.org Cc: Mears, David B ; Herren, Elaine ; Rao, Shobha (NonStop) Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer On Sat, 4 Aug 2018 at 00:11, Dyslin, Mike wrote: > Rob, > > We do not know how our consumer is managing credit, or anything about > credit flow, but have started looking for information on this. It > sounds like the right place to look. If we could figure out how to > turn off the flow control limits, that may do it. We inherited most > of this code, and the original authors of the code are long gone, so > we don't have the experience of putting it all together. Perhaps the > defaults for this credit flow is different between the C++ and Java brokers. > > OK, we'll try to figure out how to get protocol logging turned on and > get a log file to look at. > Thanks - I had a quick look at the Java Broker code for managing credit and didn't immediately see any obvious errors that would hit a properly functioning client, *however* it does look like that if the client is improperly managing credit there would be an overflow error where a value that should be an unsigned integral value (the amount of remaining credit) will turn negative. The broker is storing the amount of outstanding credit as a (signed) Java long value. AMQP 0-10 defines the message.flow command as "This command controls the flow of message data to a given destination. It is used by the recipient of messages to dynamically match the incoming rate of message flow to its processing or forwarding capacity. Upon receipt of this command, the sender must add "value" number of the specified unit to the available credit balance for the specified destination." So if the client is repeatedly adding more credit than it needs the stored "limit" in the broker might overflow and turn negative. At this point the broker would stop sending messages. -- Rob > > Thanks, > Mike > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Friday, August 3, 2018 11:11 AM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer > messages after 4 GB data transfer > > On Fri, 3 Aug 2018 at 19:18, Dyslin, Mike wrote: > > > Rob, > > > > Our consumer client version is 1.37: > > > >bash 0 3: rpm -qa | grep -i qpid > >qpid-cpp-client-devel-1.37.0-1.el7.x86_64 > >python-qpid-1.37.0-1.el7.noarch > >qpid-qmf-1.37.0-1.el7.x86_64 > >qpid-cpp-client-1.37.0-1.el7.x86_64 > >python-qpid-qmf-1.37.0-1.el7.x86_64 > >qpid-cpp-server-1.37.0-1.el7.x86_64 > >qpid-proton-c-0.18.1-1.el7.x86_64 > >qpid-tools-1.37.0-1.el7.noarch > > > > Our producer client version is 6.1.5: > &
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
On Sat, 4 Aug 2018 at 00:11, Dyslin, Mike wrote: > Rob, > > We do not know how our consumer is managing credit, or anything about > credit flow, but have started looking for information on this. It sounds > like the right place to look. If we could figure out how to turn off the > flow control limits, that may do it. We inherited most of this code, and > the original authors of the code are long gone, so we don't have the > experience of putting it all together. Perhaps the defaults for this > credit flow is different between the C++ and Java brokers. > > OK, we'll try to figure out how to get protocol logging turned on and get > a log file to look at. > Thanks - I had a quick look at the Java Broker code for managing credit and didn't immediately see any obvious errors that would hit a properly functioning client, *however* it does look like that if the client is improperly managing credit there would be an overflow error where a value that should be an unsigned integral value (the amount of remaining credit) will turn negative. The broker is storing the amount of outstanding credit as a (signed) Java long value. AMQP 0-10 defines the message.flow command as "This command controls the flow of message data to a given destination. It is used by the recipient of messages to dynamically match the incoming rate of message flow to its processing or forwarding capacity. Upon receipt of this command, the sender must add "value" number of the specified unit to the available credit balance for the specified destination." So if the client is repeatedly adding more credit than it needs the stored "limit" in the broker might overflow and turn negative. At this point the broker would stop sending messages. -- Rob > > Thanks, > Mike > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Friday, August 3, 2018 11:11 AM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages > after 4 GB data transfer > > On Fri, 3 Aug 2018 at 19:18, Dyslin, Mike wrote: > > > Rob, > > > > Our consumer client version is 1.37: > > > >bash 0 3: rpm -qa | grep -i qpid > >qpid-cpp-client-devel-1.37.0-1.el7.x86_64 > >python-qpid-1.37.0-1.el7.noarch > >qpid-qmf-1.37.0-1.el7.x86_64 > >qpid-cpp-client-1.37.0-1.el7.x86_64 > >python-qpid-qmf-1.37.0-1.el7.x86_64 > >qpid-cpp-server-1.37.0-1.el7.x86_64 > >qpid-proton-c-0.18.1-1.el7.x86_64 > >qpid-tools-1.37.0-1.el7.noarch > > > > Our producer client version is 6.1.5: > > -rw-r--r--1 NSDA.NSDA NSDA 570873 Jul 26 15:42 > > qpid-client-6.1.5.jar > > -rw-r--r--1 NSDA.NSDA NSDA 864493 Jul 26 15:42 > > qpid-common-6.1.5.jar > > > > Both producer and consumer clients use AMQP_0_10 protocol. > > > > OK - so my assumption here is that there is some issue in the management > of credit in the broker (or possibly in the client). AMQP 0-10 has two > distinct credit flow modes "credit" and "window" and also allows the > consumer to separately set limits for both "message" and "byte" credit. > I'm not very familiar with the C++ API, but do you know how your consumer > is managing credit? > > One thing that would be very helpful in trying to diagnose this problem is > getting protocol logging for the consumer (at least for the start of the > consumer where it sets up the credit flow mode, and towards the end where > it would be interesting to see the credit being allocated just before > message flow stops). > > -- Rob > > > > > > Thanks for your assistance, > > Mike > > > > FYI - There may be a typo on the past releases web page. I believe > "2017" > > should be "2018" in "Qpid JMS AMQP 0-x 6.3.2, July 2017". URL: > > https://qpid.apache.org/releases/index.html#past-releases > > > > -Original Message- > > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > > Sent: Thursday, August 2, 2018 5:57 PM > > To: users@qpid.apache.org > > Cc: Mears, David B ; Herren, Elaine < > > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > > > > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer > > messages after 4 GB data transfer > > > > Hi Mike, > > > > On Fri, 3 Aug 2018 at 01:25, Dyslin, Mike wrote: > > > > > This is my first submit to this email group. Hopefully this is the > > > correct place to post
RE: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Rob, We do not know how our consumer is managing credit, or anything about credit flow, but have started looking for information on this. It sounds like the right place to look. If we could figure out how to turn off the flow control limits, that may do it. We inherited most of this code, and the original authors of the code are long gone, so we don't have the experience of putting it all together. Perhaps the defaults for this credit flow is different between the C++ and Java brokers. OK, we'll try to figure out how to get protocol logging turned on and get a log file to look at. Thanks, Mike -Original Message- From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] Sent: Friday, August 3, 2018 11:11 AM To: users@qpid.apache.org Cc: Mears, David B ; Herren, Elaine ; Rao, Shobha (NonStop) Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer On Fri, 3 Aug 2018 at 19:18, Dyslin, Mike wrote: > Rob, > > Our consumer client version is 1.37: > >bash 0 3: rpm -qa | grep -i qpid >qpid-cpp-client-devel-1.37.0-1.el7.x86_64 >python-qpid-1.37.0-1.el7.noarch >qpid-qmf-1.37.0-1.el7.x86_64 >qpid-cpp-client-1.37.0-1.el7.x86_64 >python-qpid-qmf-1.37.0-1.el7.x86_64 >qpid-cpp-server-1.37.0-1.el7.x86_64 >qpid-proton-c-0.18.1-1.el7.x86_64 >qpid-tools-1.37.0-1.el7.noarch > > Our producer client version is 6.1.5: > -rw-r--r--1 NSDA.NSDA NSDA 570873 Jul 26 15:42 > qpid-client-6.1.5.jar > -rw-r--r--1 NSDA.NSDA NSDA 864493 Jul 26 15:42 > qpid-common-6.1.5.jar > > Both producer and consumer clients use AMQP_0_10 protocol. > OK - so my assumption here is that there is some issue in the management of credit in the broker (or possibly in the client). AMQP 0-10 has two distinct credit flow modes "credit" and "window" and also allows the consumer to separately set limits for both "message" and "byte" credit. I'm not very familiar with the C++ API, but do you know how your consumer is managing credit? One thing that would be very helpful in trying to diagnose this problem is getting protocol logging for the consumer (at least for the start of the consumer where it sets up the credit flow mode, and towards the end where it would be interesting to see the credit being allocated just before message flow stops). -- Rob > > Thanks for your assistance, > Mike > > FYI - There may be a typo on the past releases web page. I believe "2017" > should be "2018" in "Qpid JMS AMQP 0-x 6.3.2, July 2017". URL: > https://qpid.apache.org/releases/index.html#past-releases > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Thursday, August 2, 2018 5:57 PM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer > messages after 4 GB data transfer > > Hi Mike, > > On Fri, 3 Aug 2018 at 01:25, Dyslin, Mike wrote: > > > This is my first submit to this email group. Hopefully this is the > > correct place to post this problem. > > > > > This is exactly the right place to post this problem. > > > > We are running a continuous stream of message (about 5K each) from > > producer to consumer over a single java broker queue at a rate of > > about 600 messages/second. Outbound message flow stops after > > transferring 4 GB of message data (about 770,000 messages in 25 > > minutes). The Web Management Console page for our consumer > > connection > shows the total "Outbound Bytes" > > growing steadily until it reaches 4.0 GB and stops with "Last I/O time" > > unchanging thereafter. > > > > After outbound messages stop: > > Inbound messages continue on the producer connection (well past 4.0 > > GB) and are kept in the queue until they expire with a time-to-live > > value of 3 minutes. The queue grows until is stabilizes with a > > steady > > 600 m/s inbound, and 600 m/s expiring and being deleted from the > > queue (as expected). The Web Management Console shows that the > > consumer connection remains open and is a consumer on the queue, and > > the queue shows the connection as a consumer on the queue. > > > > If I run the exact same test replacing the Java Broker with a C++ > > broker (1.37.0), message flow continues well past the 4 GB barrier. > > I kept it running for about 17 hours reaching about 37 million > > messages, about 180 GB data transferred on the queue. > > > > Since the only dif
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
On Fri, 3 Aug 2018 at 20:10, Rob Godfrey wrote: > > > On Fri, 3 Aug 2018 at 19:18, Dyslin, Mike wrote: > >> Rob, >> >> Our consumer client version is 1.37: >> >>bash 0 3: rpm -qa | grep -i qpid >>qpid-cpp-client-devel-1.37.0-1.el7.x86_64 >>python-qpid-1.37.0-1.el7.noarch >>qpid-qmf-1.37.0-1.el7.x86_64 >>qpid-cpp-client-1.37.0-1.el7.x86_64 >>python-qpid-qmf-1.37.0-1.el7.x86_64 >>qpid-cpp-server-1.37.0-1.el7.x86_64 >>qpid-proton-c-0.18.1-1.el7.x86_64 >>qpid-tools-1.37.0-1.el7.noarch >> >> Our producer client version is 6.1.5: >> -rw-r--r--1 NSDA.NSDA NSDA 570873 Jul 26 15:42 >> qpid-client-6.1.5.jar >> -rw-r--r--1 NSDA.NSDA NSDA 864493 Jul 26 15:42 >> qpid-common-6.1.5.jar >> >> Both producer and consumer clients use AMQP_0_10 protocol. >> > > OK - so my assumption here is that there is some issue in the management > of credit in the broker (or possibly in the client). AMQP 0-10 has two > distinct credit flow modes "credit" and "window" and also allows the > consumer to separately set limits for both "message" and "byte" credit. > I'm not very familiar with the C++ API, but do you know how your consumer > is managing credit? > > One thing that would be very helpful in trying to diagnose this problem is > getting protocol logging for the consumer (at least for the start of the > consumer where it sets up the credit flow mode, and towards the end where > it would be interesting to see the credit being allocated just before > message flow stops). > As an aside, to enable broker protocol logging for AMQP 0-10 you would need to enable DEBUG logging for the logger org.apache.qpid.server.protocol.v0_10.ServerConnection , instructions on how to configure logging can be found here: https://qpid.apache.org/releases/qpid-broker-j-7.0.6/book/Java-Broker-Runtime.html#Java-Broker-Runtime-Logging If you are able to configure logging (and ensuring you have removed any confidential information from the logs), snippets from the logs showing the first parts (say the first 1000 messages or so) and the last part (making sure to include the last few MessageFlow commands sent by the client to the broker) would be super useful (note that the mailing list tends to remove attachments so the the easiest way is normally to create a JIRA for the issue and attach them there). Thanks again, Rob > -- Rob > > >> >> Thanks for your assistance, >> Mike >> >> FYI - There may be a typo on the past releases web page. I believe >> "2017" should be "2018" in "Qpid JMS AMQP 0-x 6.3.2, July 2017". URL: >> https://qpid.apache.org/releases/index.html#past-releases >> >> -Original Message----- >> From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] >> Sent: Thursday, August 2, 2018 5:57 PM >> To: users@qpid.apache.org >> Cc: Mears, David B ; Herren, Elaine < >> elaine.her...@hpe.com>; Rao, Shobha (NonStop) < >> shobha.jayatheer...@hpe.com> >> Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages >> after 4 GB data transfer >> >> Hi Mike, >> >> On Fri, 3 Aug 2018 at 01:25, Dyslin, Mike wrote: >> >> > This is my first submit to this email group. Hopefully this is the >> > correct place to post this problem. >> > >> > >> This is exactly the right place to post this problem. >> >> >> > We are running a continuous stream of message (about 5K each) from >> > producer to consumer over a single java broker queue at a rate of >> > about 600 messages/second. Outbound message flow stops after >> > transferring 4 GB of message data (about 770,000 messages in 25 >> > minutes). The Web Management Console page for our consumer connection >> shows the total "Outbound Bytes" >> > growing steadily until it reaches 4.0 GB and stops with "Last I/O time" >> > unchanging thereafter. >> > >> > After outbound messages stop: >> > Inbound messages continue on the producer connection (well past 4.0 >> > GB) and are kept in the queue until they expire with a time-to-live >> > value of 3 minutes. The queue grows until is stabilizes with a steady >> > 600 m/s inbound, and 600 m/s expiring and being deleted from the queue >> > (as expected). The Web Management Console shows that the consumer >> > connection remains open and is a consumer on the queue, and the queue >> > shows the connection as a consumer on the queue. >> &g
Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
On Fri, 3 Aug 2018 at 19:18, Dyslin, Mike wrote: > Rob, > > Our consumer client version is 1.37: > >bash 0 3: rpm -qa | grep -i qpid >qpid-cpp-client-devel-1.37.0-1.el7.x86_64 >python-qpid-1.37.0-1.el7.noarch >qpid-qmf-1.37.0-1.el7.x86_64 >qpid-cpp-client-1.37.0-1.el7.x86_64 >python-qpid-qmf-1.37.0-1.el7.x86_64 >qpid-cpp-server-1.37.0-1.el7.x86_64 >qpid-proton-c-0.18.1-1.el7.x86_64 >qpid-tools-1.37.0-1.el7.noarch > > Our producer client version is 6.1.5: > -rw-r--r--1 NSDA.NSDA NSDA 570873 Jul 26 15:42 > qpid-client-6.1.5.jar > -rw-r--r--1 NSDA.NSDA NSDA 864493 Jul 26 15:42 > qpid-common-6.1.5.jar > > Both producer and consumer clients use AMQP_0_10 protocol. > OK - so my assumption here is that there is some issue in the management of credit in the broker (or possibly in the client). AMQP 0-10 has two distinct credit flow modes "credit" and "window" and also allows the consumer to separately set limits for both "message" and "byte" credit. I'm not very familiar with the C++ API, but do you know how your consumer is managing credit? One thing that would be very helpful in trying to diagnose this problem is getting protocol logging for the consumer (at least for the start of the consumer where it sets up the credit flow mode, and towards the end where it would be interesting to see the credit being allocated just before message flow stops). -- Rob > > Thanks for your assistance, > Mike > > FYI - There may be a typo on the past releases web page. I believe "2017" > should be "2018" in "Qpid JMS AMQP 0-x 6.3.2, July 2017". URL: > https://qpid.apache.org/releases/index.html#past-releases > > -Original Message- > From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] > Sent: Thursday, August 2, 2018 5:57 PM > To: users@qpid.apache.org > Cc: Mears, David B ; Herren, Elaine < > elaine.her...@hpe.com>; Rao, Shobha (NonStop) > > Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages > after 4 GB data transfer > > Hi Mike, > > On Fri, 3 Aug 2018 at 01:25, Dyslin, Mike wrote: > > > This is my first submit to this email group. Hopefully this is the > > correct place to post this problem. > > > > > This is exactly the right place to post this problem. > > > > We are running a continuous stream of message (about 5K each) from > > producer to consumer over a single java broker queue at a rate of > > about 600 messages/second. Outbound message flow stops after > > transferring 4 GB of message data (about 770,000 messages in 25 > > minutes). The Web Management Console page for our consumer connection > shows the total "Outbound Bytes" > > growing steadily until it reaches 4.0 GB and stops with "Last I/O time" > > unchanging thereafter. > > > > After outbound messages stop: > > Inbound messages continue on the producer connection (well past 4.0 > > GB) and are kept in the queue until they expire with a time-to-live > > value of 3 minutes. The queue grows until is stabilizes with a steady > > 600 m/s inbound, and 600 m/s expiring and being deleted from the queue > > (as expected). The Web Management Console shows that the consumer > > connection remains open and is a consumer on the queue, and the queue > > shows the connection as a consumer on the queue. > > > > If I run the exact same test replacing the Java Broker with a C++ > > broker (1.37.0), message flow continues well past the 4 GB barrier. I > > kept it running for about 17 hours reaching about 37 million messages, > > about 180 GB data transferred on the queue. > > > > Since the only difference seems to be the broker, this seems to point > > to a problem with the Java Broker, and not issues with our producer, > > consumer or network issues. Could there be some problem with our java > > broker configuration that would explain this behaviour? > > > > Unfortunately this sounds like it may be a bug in the Java Broker :-( > > > > > > Has anyone out there experienced more than 4 GB of outbound data on a > > single java broker connection or queue? > > > > > Can you confirm which client you are using, and which version of AMQP is > in use (as you have identified I don't expect this to be a client problem, > but knowing the client will help us track down the issue in the broker)? > > > > Any help would be appreciated. > > > > Other comments/observations: > > > > I do not know if the 4 GB barrier is associated with the connection > > and
RE: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer
Rob, Our consumer client version is 1.37: bash 0 3: rpm -qa | grep -i qpid qpid-cpp-client-devel-1.37.0-1.el7.x86_64 python-qpid-1.37.0-1.el7.noarch qpid-qmf-1.37.0-1.el7.x86_64 qpid-cpp-client-1.37.0-1.el7.x86_64 python-qpid-qmf-1.37.0-1.el7.x86_64 qpid-cpp-server-1.37.0-1.el7.x86_64 qpid-proton-c-0.18.1-1.el7.x86_64 qpid-tools-1.37.0-1.el7.noarch Our producer client version is 6.1.5: -rw-r--r--1 NSDA.NSDA NSDA 570873 Jul 26 15:42 qpid-client-6.1.5.jar -rw-r--r--1 NSDA.NSDA NSDA 864493 Jul 26 15:42 qpid-common-6.1.5.jar Both producer and consumer clients use AMQP_0_10 protocol. Thanks for your assistance, Mike FYI - There may be a typo on the past releases web page. I believe "2017" should be "2018" in "Qpid JMS AMQP 0-x 6.3.2, July 2017". URL: https://qpid.apache.org/releases/index.html#past-releases -Original Message- From: Rob Godfrey [mailto:rob.j.godf...@gmail.com] Sent: Thursday, August 2, 2018 5:57 PM To: users@qpid.apache.org Cc: Mears, David B ; Herren, Elaine ; Rao, Shobha (NonStop) Subject: Re: Java Broker (7.0.6) stops delivering queue/consumer messages after 4 GB data transfer Hi Mike, On Fri, 3 Aug 2018 at 01:25, Dyslin, Mike wrote: > This is my first submit to this email group. Hopefully this is the > correct place to post this problem. > > This is exactly the right place to post this problem. > We are running a continuous stream of message (about 5K each) from > producer to consumer over a single java broker queue at a rate of > about 600 messages/second. Outbound message flow stops after > transferring 4 GB of message data (about 770,000 messages in 25 > minutes). The Web Management Console page for our consumer connection shows > the total "Outbound Bytes" > growing steadily until it reaches 4.0 GB and stops with "Last I/O time" > unchanging thereafter. > > After outbound messages stop: > Inbound messages continue on the producer connection (well past 4.0 > GB) and are kept in the queue until they expire with a time-to-live > value of 3 minutes. The queue grows until is stabilizes with a steady > 600 m/s inbound, and 600 m/s expiring and being deleted from the queue > (as expected). The Web Management Console shows that the consumer > connection remains open and is a consumer on the queue, and the queue > shows the connection as a consumer on the queue. > > If I run the exact same test replacing the Java Broker with a C++ > broker (1.37.0), message flow continues well past the 4 GB barrier. I > kept it running for about 17 hours reaching about 37 million messages, > about 180 GB data transferred on the queue. > > Since the only difference seems to be the broker, this seems to point > to a problem with the Java Broker, and not issues with our producer, > consumer or network issues. Could there be some problem with our java > broker configuration that would explain this behaviour? > Unfortunately this sounds like it may be a bug in the Java Broker :-( > > Has anyone out there experienced more than 4 GB of outbound data on a > single java broker connection or queue? > > Can you confirm which client you are using, and which version of AMQP is in use (as you have identified I don't expect this to be a client problem, but knowing the client will help us track down the issue in the broker)? > Any help would be appreciated. > > Other comments/observations: > > I do not know if the 4 GB barrier is associated with the connection > and/or the queue because all our message traffic is over one consumer > connection and one queue. I could determine this by changing our > consumer code to spread message traffic over one connection and multiple > queues. > > We are using the heartbeat feature with a 5 minute timeout. Since the > connection stays open beyond the 5 minute timeout after the messages > stop, I assume the heartbeat messages are still being sent between > consumer and broker, indicating that the consumer and broker are able > to communicate over the socket. It has been awhile since I have > tested that the heartbeat feature is working correctly. > > If I close the consumer connection from the Web Management Console, > the broker deletes the queue (I believe) and our consumer detects the > closed connection, establishes a new connection and new queue, and > messages start flowing again until . . . we reach the 4 GB barrier and > messages stop being delivered once again. > > We have run with the Java Broker on both Linux (RHEL 7.4) and > proprietary NonStop POSIX platform with the same results. > Unfortunately, the C++ broker is n
