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From Josh Elser <>
Subject Re: Kerberos ticket renewal
Date Tue, 11 Jul 2017 01:59:04 GMT
No, you are (likely) not running into ACCUMULO-4069. What you've
described sounds like your client's ticket expired. Accumulo does not
spawn any ticket renewal on the behalf of clients.

Hadoop's UGI code will automatically spawn a renewal thread when you
log in using a ticket cache. This does not happen automatically when
you use a keytab (I have no explanation as to why this is). This is
the most likely cause of your error and something you need to correct
in your application (spawn a thread to renew your application's

If you are using MapReduce, you have yet another layer of indirection
with DelegationTokens, but that's probably not what you're seeing (as
DelegationTokens don't actually have a Kerberos TGT).

On Mon, Jul 10, 2017 at 5:42 PM, Christopher <> wrote:
> It certainly sounds like the same issue. I'd recommend upgrading to the
> latest 1.7.3 (currently the latest 1.7 version) to include all the bugs
> we've found and fixed in that release line.
> On Mon, Jul 10, 2017 at 5:50 AM James Srinivasan
> <> wrote:
>> I'm using Accumulo 1.7.0 and finding that after some period of time
>> (>8 hours, <3 days - happened over the weekend) my ingest fails with
>> errors regarding "Failed to find any Kerberos tgt". My guess is that
>> the ticket from the keytab has expired, and needs to be renewed - from
>> memory, I had seen a Kerberos tgt renewer thread running in my client,
>> so assumed it happened automagically. Is that the case? Perhaps I am
>> hitting this bug?
>> Thanks,
>> James

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