[tor-relays] new log message: [warn] Unparseable microdescriptor

[teor]

Hi,

Thanks for reporting this bug.

> On 30 Oct 2018, at 04:18, Felix <zwiebel at quantentunnel.de> wrote:
> 
> Are the two warnings below of the same type for this issue?

Not really: they're corrupt on disk, rather than from the network.

> Am 29.10.2018 um 07:03 schrieb teor:
>> 
>> 
>>> On 24 Oct 2018, at 07:38, Toralf Förster <toralf.foerster at gmx.de> wrote:
>>> 
>>> Get this at my exit relay since yesterday:
>>> 
>>> # head /tmp/warn.log
>>> Oct 23 23:30:17.000 [notice] Tor 0.3.5.3-alpha opening new log file.
>>> Oct 23 23:30:33.000 [warn] parse error: internal NUL character.
>>> Oct 23 23:30:33.000 [warn] Unparseable microdescriptor
>>> Oct 23 23:30:33.000 [warn] parse error: internal NUL character.
>>> Oct 23 23:30:33.000 [warn] Unparseable microdescriptor
>>> 
>>> even with log level "debug" there seems to be no more information.
>> 
>> ...
> 
> Non-exit
> Oct 28 23:48:32.587 [notice] Tor 0.3.5.3-alpha running on FreeBSD with
> Libevent 2.1.8-stable, OpenSSL LibreSSL 2.7.4, Zlib 1.2.11, Liblzma
> 5.2.3, and Libzstd 1.3.5.
> ...
> Oct 28 23:48:33.000 [notice] Bootstrapped 0%: Starting
> Oct 28 23:48:34.000 [warn] couldn't find start of hashed material
> "network-status-version"
> Oct 28 23:48:34.000 [warn] Unable to compute digest of network-status
> Oct 28 23:48:34.000 [warn] Unable to parse networkstatus consensus
> Oct 28 23:48:34.000 [warn] Couldn't load consensus microdesc
> networkstatus from cache

This looks like file corruption, but we'd still like to see the corrupt file,
because it might be tor's fault.

> Oct 28 23:48:34.000 [warn] parse error: Malformed object: missing object
> end line
> Oct 28 23:48:34.000 [warn] Unparseable microdescriptor

This is probably also file corruption: tor won't download microdescs until
it has a list of microdescs from a valid consensus.

> Bridge:
> Oct 28 14:35:17.667 [notice] Tor 0.3.3.9 (git-45028085ea188baf) running
> on FreeBSD with Libevent 2.1.8-stable, OpenSSL LibreSSL 2.7.4, Zlib
> 1.2.11, Liblzma 5.2.3, and Libzstd 1.3.5.
> ...
> Oct 28 14:35:53.000 [notice] Bootstrapped 0%: Starting
> Oct 28 14:35:55.000 [warn] parse error: Annotations mixed with keywords
> Oct 28 14:35:55.000 [warn] Unparseable microdescriptor

Given the timing, this is probably also file corruption.

Please post any corrupt directory files that you have to:
https://trac.torproject.org/projects/tor/ticket/28241

It would also be useful to have the logs from when tor last shut down.
(Was it a clean shutdown?)

T

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