[bitcoin-dev] Planned Obsolescence

[bitcoin-dev] Planned Obsolescence

[jg]

Today according to the stats at https://bitnodes.21.co/nodes/ the top 10 
Bitcoin running node versions are:

1.
_Version Satoshi:0.13.1
_Nodes 2071
_38.97%


2.
_Version Satoshi:0.12.1
_Nodes 1022
_19.23%


3.
Satoshi:0.13.0
_Nodes 604
_11.36%


4.
Bitcoin Unlimited:0.12.1
_Nodes 373
_7.02%


5.
Satoshi:0.11.2
_Nodes 183
_3.44%


6.
Satoshi:0.12.0
_Nodes 131
_2.46%


7. Satoshi:0.13.99
_Nodes 122
_2.30%


8.
Satoshi:0.11.0
_Nodes 87
_1.64%


9.
BTCC:0.13.1
_Nodes 53
_1.00%


10.
Satoshi:0.10.2
_Nodes 52
_0.98%


Other
_Nodes 617
_11.61%


There are 75 different versions of visible nodes on the network.

More than 30% of the nodes running Bitcoin Core are running versions 
older than 0.13.0.

For reasons I am unable to determine a significant number of node 
operators do not upgrade their clients.

I also know newer versions require the same or fewer hardware resources 
to run than the same network requirements as older versions of the 
client.

Older node versions may generate issues because some upgrades will make 
several of the nodes running older protocol versions obsolete and or 
incompatible. There may be other hard to predict behaviors on older 
versions of the client.

In order to avoid such wide fragmentation of "Bitcoin Core” node 
versions and to help there be a more predictable protocol improvement 
process, I consider it worth it to analyze introducing some planned 
obsolescence in each new version. In the last year we had 4 new versions 
so if each version is valid for about 1 year (52560 blocks) this may be 
a reasonable time frame for node operators to upgrade. If a node does 
not upgrade it will stop working instead of participating in the network 
with an outdated protocol version.

These changes may also simplify the developer's jobs in some cases by 
avoiding them having to deal with ancient versions of the client.

Regards
Juan Garavaglia

Re: [bitcoin-dev] Planned Obsolescence

[Aymeric Vitte]

Maybe there are still some advantages but I don't know why this is not
considered as a major issue by the bitcoin community for the future and
why this looks to be never discussed:

- the size of the bitcoin network in terms of full nodes is ridiculous
and this is continuously decreasing, we cannot consider the bitcoin
network as a decentralized p2p network, what you are proposing is
logical but will of course amplify the problem

>For reasons I am unable to determine a significant number of node
operators do not upgrade their clients.

Why should they? What is the incentive for people to run full nodes and
upgrade? FYI I am part of the 2071 0.13.1 nodes for some good reasons
but will just shut it down when I am done, same for zcash (which as a
matter of fact I upgraded today since by some chance I noticed some
updates I was not aware of neither notified, just running it because I
need it from time to time and just don't kill it so I don't have to wait
for the restart process, maybe others are doing the same or just forgot
that they were running a full node)

Because, again, why should I or we maintain it/them?

I have looked at the proposals in the past (as well as the incentive
program) to reward those that are running full nodes but only found a
very few, never implemented (or even considered)

This is the very same for proposals allowing to start a full node from
zero in an acceptable timeframe (ie not 10 days in my case)

If the consensus is not to solve those two points and have a bitcoin
network controlled then it would be interesting to know why, so people
don't waste time trying to find solutions

Satoshi himself predicted that the full nodes will get centralized, I
think it's wrong, or in that case the bitcoin network cannot pretend to
be a decentralized immutable system (can be compared then to the Tor
network which does not pretend to be decentralized, because it is
centralized, and in addition does not encourage small nodes)

PS: IMHO the email notificiation system makes it difficult to follow
whom is answering to whom/what on this list compared to other lists

-- 
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Re: [bitcoin-dev] Planned Obsolescence

[Jorge Timón]

On Thu, Dec 15, 2016 at 4:38 AM, Juan Garavaglia via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
> Older node versions may generate issues because some upgrades will make
> several of the nodes running older protocol versions obsolete and or
> incompatible. There may be other hard to predict behaviors on older versions
> of the client.

Hard to predict or not, you can't force people to run newer software.

> In order to avoid such wide fragmentation of "Bitcoin Core” node versions
> and to help there be a more predictable protocol improvement process, I
> consider it worth it to analyze introducing some planned obsolescence in
> each new version. In the last year we had 4 new versions so if each version
> is valid for about 1 year (52560 blocks) this may be a reasonable time frame
> for node operators to upgrade. If a node does not upgrade it will stop
> working instead of participating in the network with an outdated protocol
> version.

When you introduce anti-features like this in free software they can
be trivially removed and they likely will.

> These changes may also simplify the developer's jobs in some cases by
> avoiding them having to deal with ancient versions of the client.

There's a simpler solution for this which is what is being done now:
stop maintaining and giving support for older versions.
There's limited resources and developers are rarely interested in
fixing bugs for very old versions. Users shouldn't expect things to be
backported to old versions (if developers do it and there's enough
testing, there's no reason not to do more releases of old versions, it
is just rarely the case).

Re: [bitcoin-dev] Planned Obsolescence

[Angel Leon]

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Perhaps if there were a message that would nag your stdout or log output
letting you know there's a new version available, or N more versions
available and that you might be missing out on X security patches, Y
protocol improvements, depending on how far back you are, you'd be tempted
to upgrade, works for me in Ubuntu every time I log to my servers and I see
how far behind I am in terms of available updates.

Other thing done in open source projects to encourage updates, is to
automatically distribute (download) the patches and let the node operator
know an update has been downloaded for them, and let them know they're just
one step away from applying such update.
We do this for our bittorrent client. We don't ever want to do automatic
upgrades of our network, however, we want to make it painless to update.

For Bitcoin this could be done for the official binary distribution, would
not be an option for those that build from source.

On Thu, Dec 15, 2016 at 11:49 AM Jorge Timón via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> On Thu, Dec 15, 2016 at 4:38 AM, Juan Garavaglia via bitcoin-dev
> <bitcoin-dev@lists.linuxfoundation.org> wrote:
> > Older node versions may generate issues because some upgrades will make
> > several of the nodes running older protocol versions obsolete and or
> > incompatible. There may be other hard to predict behaviors on older
> versions
> > of the client.
>
> Hard to predict or not, you can't force people to run newer software.
>
> > In order to avoid such wide fragmentation of "Bitcoin Core” node versions
> > and to help there be a more predictable protocol improvement process, I
> > consider it worth it to analyze introducing some planned obsolescence in
> > each new version. In the last year we had 4 new versions so if each
> version
> > is valid for about 1 year (52560 blocks) this may be a reasonable time
> frame
> > for node operators to upgrade. If a node does not upgrade it will stop
> > working instead of participating in the network with an outdated protocol
> > version.
>
> When you introduce anti-features like this in free software they can
> be trivially removed and they likely will.
>
> > These changes may also simplify the developer's jobs in some cases by
> > avoiding them having to deal with ancient versions of the client.
>
> There's a simpler solution for this which is what is being done now:
> stop maintaining and giving support for older versions.
> There's limited resources and developers are rarely interested in
> fixing bugs for very old versions. Users shouldn't expect things to be
> backported to old versions (if developers do it and there's enough
> testing, there's no reason not to do more releases of old versions, it
> is just rarely the case).
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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Re: [bitcoin-dev] Planned Obsolescence

[Ethan Heilman]

I assume this has been well discussed in at some point in the Bitcoin
community, so I apologize if I'm repeating old ideas.

Problem exploitable nodes:
It is plausible that people running these versions of bitcoind may not
be applying patches. Thus, these nodes may be vulnerable to known
exploits. I would hope none of these nodes are gateway nodes for
miners, web wallets or exchanges. How difficult would it be to crawl
the network to find vulnerable nodes and exploit them? What percentage
of the network is running vulnerable versions of bitcoind?

Problem eclipsable nodes:
Currently a bitcoind node disconnects from any node with a version
below MIN_PEER_PROTO_VERSION. Such nodes become be ripe for an eclipse
attack because they are partitioned from the newer nodes, especially
when they are "freshly obsolete". I have not examined how protocol
versioning works in detail so I could be missing something.

One option could be that after a grace period:
1. to still connect to obsolete nodes and even to transmit blockheaders,
2. but to stop sending the full-blocks and transactions to these
nodes, thereby alerting the operator that something is wrong and
causing them to upgrade.
It may make sense to create this as a rule, if your longest chain
consists of only blockheaders and no one will tell you the
transactions for over 1000 blocks you are obsolete, spit out an error
message and shutdown.

This would not address the issue of alt-coins which are forked from
old vulnerable versions of bitcoind, but that is probably out of
scope.

On Thu, Dec 15, 2016 at 1:48 PM, Jorge Timón via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
> On Thu, Dec 15, 2016 at 4:38 AM, Juan Garavaglia via bitcoin-dev
> <bitcoin-dev@lists.linuxfoundation.org> wrote:
>> Older node versions may generate issues because some upgrades will make
>> several of the nodes running older protocol versions obsolete and or
>> incompatible. There may be other hard to predict behaviors on older versions
>> of the client.
>
> Hard to predict or not, you can't force people to run newer software.
>
>> In order to avoid such wide fragmentation of "Bitcoin Core” node versions
>> and to help there be a more predictable protocol improvement process, I
>> consider it worth it to analyze introducing some planned obsolescence in
>> each new version. In the last year we had 4 new versions so if each version
>> is valid for about 1 year (52560 blocks) this may be a reasonable time frame
>> for node operators to upgrade. If a node does not upgrade it will stop
>> working instead of participating in the network with an outdated protocol
>> version.
>
> When you introduce anti-features like this in free software they can
> be trivially removed and they likely will.
>
>> These changes may also simplify the developer's jobs in some cases by
>> avoiding them having to deal with ancient versions of the client.
>
> There's a simpler solution for this which is what is being done now:
> stop maintaining and giving support for older versions.
> There's limited resources and developers are rarely interested in
> fixing bugs for very old versions. Users shouldn't expect things to be
> backported to old versions (if developers do it and there's enough
> testing, there's no reason not to do more releases of old versions, it
> is just rarely the case).
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev

Re: [bitcoin-dev] Planned Obsolescence

[Matt Corallo]

One thing which hasn't been addressed yet in this thread is developer centralization. Unlike other applications we want to ensure that it's not only possible for users to refuse an upgrade, but easy. While this by no means lessens the retirement that users run up to date software for security reasons, finding the right line to draw is difficult. 

Matt

On December 15, 2016 2:44:55 PM PST, Ethan Heilman via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
>I assume this has been well discussed in at some point in the Bitcoin
>community, so I apologize if I'm repeating old ideas.
>
>Problem exploitable nodes:
>It is plausible that people running these versions of bitcoind may not
>be applying patches. Thus, these nodes may be vulnerable to known
>exploits. I would hope none of these nodes are gateway nodes for
>miners, web wallets or exchanges. How difficult would it be to crawl
>the network to find vulnerable nodes and exploit them? What percentage
>of the network is running vulnerable versions of bitcoind?
>
>Problem eclipsable nodes:
>Currently a bitcoind node disconnects from any node with a version
>below MIN_PEER_PROTO_VERSION. Such nodes become be ripe for an eclipse
>attack because they are partitioned from the newer nodes, especially
>when they are "freshly obsolete". I have not examined how protocol
>versioning works in detail so I could be missing something.
>
>One option could be that after a grace period:
>1. to still connect to obsolete nodes and even to transmit
>blockheaders,
>2. but to stop sending the full-blocks and transactions to these
>nodes, thereby alerting the operator that something is wrong and
>causing them to upgrade.
>It may make sense to create this as a rule, if your longest chain
>consists of only blockheaders and no one will tell you the
>transactions for over 1000 blocks you are obsolete, spit out an error
>message and shutdown.
>
>This would not address the issue of alt-coins which are forked from
>old vulnerable versions of bitcoind, but that is probably out of
>scope.
>
>On Thu, Dec 15, 2016 at 1:48 PM, Jorge Timón via bitcoin-dev
><bitcoin-dev@lists.linuxfoundation.org> wrote:
>> On Thu, Dec 15, 2016 at 4:38 AM, Juan Garavaglia via bitcoin-dev
>> <bitcoin-dev@lists.linuxfoundation.org> wrote:
>>> Older node versions may generate issues because some upgrades will
>make
>>> several of the nodes running older protocol versions obsolete and or
>>> incompatible. There may be other hard to predict behaviors on older
>versions
>>> of the client.
>>
>> Hard to predict or not, you can't force people to run newer software.
>>
>>> In order to avoid such wide fragmentation of "Bitcoin Core” node
>versions
>>> and to help there be a more predictable protocol improvement
>process, I
>>> consider it worth it to analyze introducing some planned
>obsolescence in
>>> each new version. In the last year we had 4 new versions so if each
>version
>>> is valid for about 1 year (52560 blocks) this may be a reasonable
>time frame
>>> for node operators to upgrade. If a node does not upgrade it will
>stop
>>> working instead of participating in the network with an outdated
>protocol
>>> version.
>>
>> When you introduce anti-features like this in free software they can
>> be trivially removed and they likely will.
>>
>>> These changes may also simplify the developer's jobs in some cases
>by
>>> avoiding them having to deal with ancient versions of the client.
>>
>> There's a simpler solution for this which is what is being done now:
>> stop maintaining and giving support for older versions.
>> There's limited resources and developers are rarely interested in
>> fixing bugs for very old versions. Users shouldn't expect things to
>be
>> backported to old versions (if developers do it and there's enough
>> testing, there's no reason not to do more releases of old versions,
>it
>> is just rarely the case).
>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev@lists.linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>_______________________________________________
>bitcoin-dev mailing list
>bitcoin-dev@lists.linuxfoundation.org
>https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev

Re: [bitcoin-dev] Planned Obsolescence

[Chris Riley]

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I agree that finding the right line is difficult and purposefully crippling
(too strong a term?) the software is not necessarily the best way to
encourage long term adoption.

For example, I ran version 0.3.x from July/August 2010 for several years on
a miner without upgrading to anything higher than the 0.3.24 release since
the usage pattern on that machine didn't require it.  It might have been to
the ~0.7.0 release, I am not sure when I finally upgraded it.  On a machine
that had my wallet, I kept it updated, but forcing upgrades may not be the
best plan given that hard forks should be few and far between.  Security
updates, are important, but leaving it up to the operator of the node to
determine when to upgrade is an important feature.

Chris


On Sun, Dec 18, 2016 at 5:34 AM, Matt Corallo via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> One thing which hasn't been addressed yet in this thread is developer
> centralization. Unlike other applications we want to ensure that it's not
> only possible for users to refuse an upgrade, but easy. While this by no
> means lessens the retirement that users run up to date software for
> security reasons, finding the right line to draw is difficult.
>
> Matt
>
> On December 15, 2016 2:44:55 PM PST, Ethan Heilman via bitcoin-dev <
> bitcoin-dev@lists.linuxfoundation.org> wrote:
> >I assume this has been well discussed in at some point in the Bitcoin
> >community, so I apologize if I'm repeating old ideas.
> >
> >Problem exploitable nodes:
> >It is plausible that people running these versions of bitcoind may not
> >be applying patches. Thus, these nodes may be vulnerable to known
> >exploits. I would hope none of these nodes are gateway nodes for
> >miners, web wallets or exchanges. How difficult would it be to crawl
> >the network to find vulnerable nodes and exploit them? What percentage
> >of the network is running vulnerable versions of bitcoind?
> >
> >Problem eclipsable nodes:
> >Currently a bitcoind node disconnects from any node with a version
> >below MIN_PEER_PROTO_VERSION. Such nodes become be ripe for an eclipse
> >attack because they are partitioned from the newer nodes, especially
> >when they are "freshly obsolete". I have not examined how protocol
> >versioning works in detail so I could be missing something.
> >
> >One option could be that after a grace period:
> >1. to still connect to obsolete nodes and even to transmit
> >blockheaders,
> >2. but to stop sending the full-blocks and transactions to these
> >nodes, thereby alerting the operator that something is wrong and
> >causing them to upgrade.
> >It may make sense to create this as a rule, if your longest chain
> >consists of only blockheaders and no one will tell you the
> >transactions for over 1000 blocks you are obsolete, spit out an error
> >message and shutdown.
> >
> >This would not address the issue of alt-coins which are forked from
> >old vulnerable versions of bitcoind, but that is probably out of
> >scope.
> >
> >On Thu, Dec 15, 2016 at 1:48 PM, Jorge Timón via bitcoin-dev
> ><bitcoin-dev@lists.linuxfoundation.org> wrote:
> >> On Thu, Dec 15, 2016 at 4:38 AM, Juan Garavaglia via bitcoin-dev
> >> <bitcoin-dev@lists.linuxfoundation.org> wrote:
> >>> Older node versions may generate issues because some upgrades will
> >make
> >>> several of the nodes running older protocol versions obsolete and or
> >>> incompatible. There may be other hard to predict behaviors on older
> >versions
> >>> of the client.
> >>
> >> Hard to predict or not, you can't force people to run newer software.
> >>
> >>> In order to avoid such wide fragmentation of "Bitcoin Core” node
> >versions
> >>> and to help there be a more predictable protocol improvement
> >process, I
> >>> consider it worth it to analyze introducing some planned
> >obsolescence in
> >>> each new version. In the last year we had 4 new versions so if each
> >version
> >>> is valid for about 1 year (52560 blocks) this may be a reasonable
> >time frame
> >>> for node operators to upgrade. If a node does not upgrade it will
> >stop
> >>> working instead of participating in the network with an outdated
> >protocol
> >>> version.
> >>
> >> When you introduce anti-features like this in free software they can
> >> be trivially removed and they likely will.
> >>
> >>> These changes may also simplify the developer's jobs in some cases
> >by
> >>> avoiding them having to deal with ancient versions of the client.
> >>
> >> There's a simpler solution for this which is what is being done now:
> >> stop maintaining and giving support for older versions.
> >> There's limited resources and developers are rarely interested in
> >> fixing bugs for very old versions. Users shouldn't expect things to
> >be
> >> backported to old versions (if developers do it and there's enough
> >> testing, there's no reason not to do more releases of old versions,
> >it
> >> is just rarely the case).
> >> _______________________________________________
> >> bitcoin-dev mailing list
> >> bitcoin-dev@lists.linuxfoundation.org
> >> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
> >_______________________________________________
> >bitcoin-dev mailing list
> >bitcoin-dev@lists.linuxfoundation.org
> >https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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Re: [bitcoin-dev] Planned Obsolescence

[Alice Wonder]

On 12/14/2016 07:38 PM, Juan Garavaglia via bitcoin-dev wrote:

>
> For reasons I am unable to determine a significant number of node
> operators do not upgrade their clients.

I almost did not update to 0.13.0 because the test suite was failing due 
to python errors. How to fix them was posted on bitcointalk.

0.13.1 came with new python errors in the test suite. So I just said 
fuck it.

When the test suite actually works in my fairly standard environment 
(CentOS) in the distributed release, I will upgrade.

Until then, I'm not jumping through hoops to make the test suite work 
and I'm not running clients that haven't passed the test suite so that's 
why I almost didn't update to 0.13.0 and haven't updated since.

[bitcoin-dev] Python test suite failures (was Re: Planned Obsolescence)

[Douglas Roark]

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On 2016/12/18 12:07, Alice Wonder via bitcoin-dev wrote:
> I almost did not update to 0.13.0 because the test suite was failing due
> to python errors. How to fix them was posted on bitcointalk.
> 
> 0.13.1 came with new python errors in the test suite. So I just said
> fuck it.
> 
> When the test suite actually works in my fairly standard environment
> (CentOS) in the distributed release, I will upgrade.

Can you post more info about the problems you're seeing, how you fixed
them, your environment, etc., or at least post an issue on Github? I'm
sure somebody would be happy to help. Some info on how to reproduce the
problems would be very helpful. :)

Thanks.

-- 
---
Douglas Roark
Cryptocurrency, network security, travel, and art.
https://onename.com/droark
joroark@vt.edu
PGP key ID: 26623924


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Re: [bitcoin-dev] Python test suite failures (was Re: Planned Obsolescence)

[Alice Wonder]

On 12/18/2016 12:51 PM, Douglas Roark via bitcoin-dev wrote:
> On 2016/12/18 12:07, Alice Wonder via bitcoin-dev wrote:
>> I almost did not update to 0.13.0 because the test suite was failing due
>> to python errors. How to fix them was posted on bitcointalk.
>>
>> 0.13.1 came with new python errors in the test suite. So I just said
>> fuck it.
>>
>> When the test suite actually works in my fairly standard environment
>> (CentOS) in the distributed release, I will upgrade.
>
> Can you post more info about the problems you're seeing, how you fixed
> them, your environment, etc., or at least post an issue on Github? I'm
> sure somebody would be happy to help. Some info on how to reproduce the
> problems would be very helpful. :)
>
> Thanks.

For 0.13.0 I had to do

export LANG=en_US.utf8

before running the test suite. I build in clean chroot build environment 
to avoid accidental linking to non-standard libraries, and in that 
environment the LANG is normally set to C as LANG normally doesn't 
matter for compiling software that is expected to run regardless of what 
the LANG is.

That I believe was fixed in 0.13.1.

In 0.13.1 the error is


Running test/bitcoin-util-test.py...
Traceback (most recent call last):
   File "./test/bitcoin-util-test.py", line 12, in <module>
     "bitcoin-util-test.json",buildenv)
   File "/builddir/build/BUILD/bitcoin-0.13.1/src/test/bctest.py", line 
54, in bctester
     bctest(testDir, testObj, buildenv.exeext)
   File "/builddir/build/BUILD/bitcoin-0.13.1/src/test/bctest.py", line 
26, in bctest
     outputData = open(testDir + "/" + outputFn).read()
FileNotFoundError: [Errno 2] No such file or directory: 
'./test/data/blanktx.json'
make[3]: *** [check-local] Error 1
make[3]: Leaving directory `/builddir/build/BUILD/bitcoin-0.13.1/src'
make[2]: *** [check-am] Error 2
make[2]: Leaving directory `/builddir/build/BUILD/bitcoin-0.13.1/src'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/builddir/build/BUILD/bitcoin-0.13.1/src'
make: *** [check-recursive] Error 1

0.13.0 test works just fine (once the LANG is set to something utf8)

Re: [bitcoin-dev] Python test suite failures (was Re: Planned Obsolescence)

[Marco Falke]

> In 0.13.1 the error is
>
>
> Running test/bitcoin-util-test.py...
> Traceback (most recent call last):
>   File "./test/bitcoin-util-test.py", line 12, in <module>
>     "bitcoin-util-test.json",buildenv)
>   File "/builddir/build/BUILD/bitcoin-0.13.1/src/test/bctest.py", line 54,
> in bctester
>     bctest(testDir, testObj, buildenv.exeext)
>   File "/builddir/build/BUILD/bitcoin-0.13.1/src/test/bctest.py", line 26,
> in bctest
>     outputData = open(testDir + "/" + outputFn).read()
> FileNotFoundError: [Errno 2] No such file or directory:
> './test/data/blanktx.json'


This was a known problem on the *master* branch. If you still
encounter any issues on the current 0.13.2 release candidate, please
let us know in https://github.com/bitcoin/bitcoin/issues/9394. (Make
sure to include the version of centos you are running)

Re: [bitcoin-dev] Planned Obsolescence

[Matt Corallo]

Please do report bugs to https://github.com/bitcoin/bitcoin . If you never report them of course they won't get fixed. I'm not aware of test suite failures and know a bunch of folks who use CentOS, though not sure how many develop on it.

On December 18, 2016 12:07:36 PM PST, Alice Wonder via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
>On 12/14/2016 07:38 PM, Juan Garavaglia via bitcoin-dev wrote:
>
>>
>> For reasons I am unable to determine a significant number of node
>> operators do not upgrade their clients.
>
>I almost did not update to 0.13.0 because the test suite was failing
>due 
>to python errors. How to fix them was posted on bitcointalk.
>
>0.13.1 came with new python errors in the test suite. So I just said 
>fuck it.
>
>When the test suite actually works in my fairly standard environment 
>(CentOS) in the distributed release, I will upgrade.
>
>Until then, I'm not jumping through hoops to make the test suite work 
>and I'm not running clients that haven't passed the test suite so
>that's 
>why I almost didn't update to 0.13.0 and haven't updated since.
>_______________________________________________
>bitcoin-dev mailing list
>bitcoin-dev@lists.linuxfoundation.org
>https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev

Re: [bitcoin-dev] Planned Obsolescence

[Btc Drak]

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Maybe something trivial like lack of Python 3 dependency on older CentOS
builds?

On Mon, Dec 19, 2016 at 2:22 AM, Matt Corallo via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> Please do report bugs to https://github.com/bitcoin/bitcoin . If you
> never report them of course they won't get fixed. I'm not aware of test
> suite failures and know a bunch of folks who use CentOS, though not sure
> how many develop on it.
>
> On December 18, 2016 12:07:36 PM PST, Alice Wonder via bitcoin-dev <
> bitcoin-dev@lists.linuxfoundation.org> wrote:
> >On 12/14/2016 07:38 PM, Juan Garavaglia via bitcoin-dev wrote:
> >
> >>
> >> For reasons I am unable to determine a significant number of node
> >> operators do not upgrade their clients.
> >
> >I almost did not update to 0.13.0 because the test suite was failing
> >due
> >to python errors. How to fix them was posted on bitcointalk.
> >
> >0.13.1 came with new python errors in the test suite. So I just said
> >fuck it.
> >
> >When the test suite actually works in my fairly standard environment
> >(CentOS) in the distributed release, I will upgrade.
> >
> >Until then, I'm not jumping through hoops to make the test suite work
> >and I'm not running clients that haven't passed the test suite so
> >that's
> >why I almost didn't update to 0.13.0 and haven't updated since.
> >_______________________________________________
> >bitcoin-dev mailing list
> >bitcoin-dev@lists.linuxfoundation.org
> >https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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