SJRK-187: Kettle crash in Storytelling Tool

[Antranig Basman]

No worries, I will reprioritise this crash which I had on my radar 
before I relocated to a half-wrecked farmhouse where the running water 
is supplied through an upturned milk crate. It should be pretty easy at 
least to patch Kettle so the concurrency failure doesn't crash the 
server, although understanding the exact circumstances might take a bit 
longer.
Sorry I haven't been around on IRC as much recently but I should finally 
get my office set up tomorrow.

Cheers,

Antranig.

On 31/03/2020 21:56, Gregor Moss wrote:
> Hi all,
> 
> I’ve got a bit of a head-scratcher: over the last year or so we’ve 
> noticed server issues with the Storytelling Tool 
> <https://secure-web.cisco.com/1D4SvCaoLS_bCgG8p1-Y8XOnp354ATtEQAY72EaPHQWr_CTe7xNrfmvdqTgkya8Ww81SJie2JS-1GEGglc9zjdLGGj0L_5PG3d3nDFVdtSovdRoG5-03Lfex3fEGbnWN8Ba8wbrneraZlGx_yFoHqd5MkYjn8CCN-JWxit1LLmONjUSzSQ3zRlrtI5SsJSy4TzNdmnTm-IY7hqQEc7FBDOJD9Rh5ChR8ABjzMPj5ayXFwXCbeMFKOEP59fDNxH9WsQ3MktO3gcdoh2hCs0i2Pb0j9yL6zbSYhl_5IneOXeTuGpO7cBuaRjZZ1BV43nNHxtHJZFFj7u1xHQBJ6iHtJgphVKYfAWne4oCKG2h_vXVO_PL59SCwGsezjCRj_QcKG0366HOe_4XJqXVbgmQxyw2JTNKb3i1RHNuszw63hxVF80K_YRqzGjtOU5Oc4ZVWOc0RGfLug8ZaytvBWK1bWdA/https%3A%2F%2Fstories.floeproject.org%2F>. 
> The most glaring symptoms are 502 errors on page load or a lack of 
> response when attempting to fetch story data or a list of stories for 
> the Browse page. The frequency of these crashes has been increasing as 
> the performance of the tool has been getting better, and we’re to a 
> point now where it is a blocker.
> 
> I believe the issues we’re experiencing now are described by SJRK-187 
> <https://secure-web.cisco.com/10zLQxIrkVBjonwjWNS8C2qN0LRNE5jc2GDgkMSkh5rWaBGeH6bCNIuV_oioyY-KAkVHJvXa9pzkifi9FuLdH3JTBhrrptoWdyz9_6tvpGWgggSxcAufH5fDp8XozUn_UMvHPtEOHLMg8UPB0LvM8Mn5okRmm-iqHlXL-L1jceelf7v7sVhhZRW-tg2tp2t4QH9PNFX4ebwx2G-0vuOKCQ83Lbtqgr-oQdYW33CSPCJ3E8MlH6yn3c9hLVsfU_SBbpDqqCMVg7BOSOiLbSiA3hcBRkEaO3JHh9crDPxadVDMGpRQaJK0-9lZh1Y-V7BVY9g5-832n2qJg01b1ize2Zye7APoR7mV5yYUTJ5LKarJvsrRUxtD-GQBYjJAQI-YEfPEjWdEpTY3sbQKX9GZe_q0Q4l7oljZwUJT9lqPDo8UYFptDBQLdg0adyOR4V585YYuNWxawWdhXIebo6Bfv4Q/https%3A%2F%2Fissues.fluidproject.org%2Fbrowse%2FSJRK-187> 
> and its comments. If my theory is correct, then the problem lies outside 
> of the Storytelling Tool codebase and likely with Kettle, though it is 
> of course entirely possible the issue is in the ST code.
> 
> Has anyone else run a Kettle server and experienced similar issues 
> relating to multithreading? Does this ring any bells? Any help with this 
> would be greatly appreciated.
> 
> Cheers,
> 
> Gregor
> 
> 
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