[SERVER-17925] mongodump occasional Assertion failure md src/mongo/util/net/message_port.cpp Created: 08/Apr/15 Updated: 13/Apr/15 Resolved: 13/Apr/15 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Tools |
| Affects Version/s: | 2.4.9 |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Rolf Schreiber | Assignee: | Sam Kleinman (Inactive) |
| Resolution: | Incomplete | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Operating System: | ALL |
| Steps To Reproduce: | Call mongodump -o /tmp/outdir |
| Participants: |
| Description |
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I get this output when calling mongodump. The assertion failure happens sometimes earlier or later in the process, or sometimes mongodump completes without an error.
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| Comments |
| Comment by Sam Kleinman (Inactive) [ 13/Apr/15 ] | |
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Thanks for your patience and attention here. I'm glad that your latest mongodump succeeded. I'm going to go ahead and close this ticket for the moment, but we can reopen this issue or open a new ticket if the issue reappears. Again, running validate() and testing against more recent versions of the tools may give us some additional insight if you run into issues like this in the future. Cheers, | |
| Comment by Rolf Schreiber [ 10/Apr/15 ] | |
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validate() showed no invalid objects (ok=1) | |
| Comment by Sam Kleinman (Inactive) [ 10/Apr/15 ] | |
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Given the presence of the {{verifyFailed}] error message, I think it's important that we rule out problems in both the tools doing the validation, and the data itself. To help us trace down the issue, it will help to see can you see if you can read this data with a different client (e.g. the 3.0 mongodump, Pymongo, another driver.) Additionally, can you check the integrity of your data using validate? You can do so by running this command:
Note that this is a resource-intensive operation and may have an impact on the performance of your MongoDB instance. Regards, | |
| Comment by Rolf Schreiber [ 10/Apr/15 ] | |
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I don't think the data is malformed: I executed the mongodump about 5 times within 30 minutes, while items where added to the collection itself at a rate of perhaps one item every five minutes. One of those 5 attempts succeeded, the other 4 times it failed at different (random) progress percentages. If data were malformed, there should be no successful dump. | |
| Comment by Sam Kleinman (Inactive) [ 08/Apr/15 ] | |
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Hello, sorry that you're seeing this error. It looks like some data is failing a validation check. In this situation we want to:
In pursuit of this, can you help us continue to debug this issue by:
I hope we can understand the underlying issue and find a resolution as soon as possible. Regards, |