[SERVER-8228] Map Reduce Data Will Sometimes Not Get Inserted Created: 18/Jan/13 Updated: 10/Dec/14 Resolved: 28/Oct/13 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | None |
| Affects Version/s: | 2.2.2 |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | William Watson | Assignee: | Unassigned |
| Resolution: | Incomplete | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Operating System: | ALL |
| Steps To Reproduce: |
This error, as far as we know, wasn't seen until version 2.2 of mongoDB. We were running these map reduces for months without major issue on 2.0, but we've never used anything besides 2.0.4 and 2.2.2 |
| Participants: |
| Description |
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We are able to run a series of map reduces that write data into an output collection without issue. However, we noticed that our results were not consistent so in testing and trying to find the issue, I have tried each of the following scenarios: Sharded database/input/output collections:
AND Unsharded database:
The results were the same no matter what we did: We started with everything sharded, moved to everything unsharded, saw the error within 2 days (didn't happen at first), then we built a MASSIVE (128 GB RAM, 16 core) unsharded, unreplicated mongodb server and have not seen the error yet. |
| Comments |
| Comment by Stennie Steneker (Inactive) [ 28/Oct/13 ] |
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Hi William, I'm closing this issue due to inactivity. If you are still seeing this issue (particularly with a newer version of MongoDB, such as 2.4.x) please feel free to open a new issue or comment on this one with the relevant details. Thanks, |
| Comment by Barrie Segal [ 18/Jan/13 ] |
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William, you can open a ticket in the Community Private project and attach the logs there. Only you, as the reporter of the ticket, and the dev team here will have access to it. |
| Comment by William Watson [ 18/Jan/13 ] |
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As long as you agree to not post the code to any ticket or public forum, and do dont disclose the code outside of 10gen, we will gladly email it. |
| Comment by William Watson [ 18/Jan/13 ] |
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We can email the code to a 10gen employee, but we will not post it here. |
| Comment by Eliot Horowitz (Inactive) [ 18/Jan/13 ] |
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Can you send the map/reduce jobs you are running? |