[Bug 1318366] Re: jujud on state server panic misses transaction in queue

[Gustavo Niemeyer]

This error should never happen on a healthy database. The only case I've
debugged with such an issue was on a system that had a corrupted
database due to an out-of-space situation.

The reason why this should never happen is clear in the code of the txn
package: before anything is ever done with regards to a transaction, the
document that represents that transaction is inserted into the database.
Just after that will the id of the referred transaction be used to tag
the documents that were affected by it. What the error is saying is that
while attempting to flush pending transactions on an affected document
it could find a reference to a transaction that does not exist.

Things that might lead to such a situation include, for example:

1. A corrupted database

2. An abrupt shutdown on a database without a journal

3. A capped transaction collection that is eating its tail while old
transactions are still in use

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Title:
  jujud on state server panic misses transaction in queue

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