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@ -36,30 +36,7 @@ |
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* much larger DB tables so that ckdb is effectively ready for messages |
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* much larger DB tables so that ckdb is effectively ready for messages |
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* almost immediately |
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* almost immediately |
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* The first ckpool message allows us to know where ckpool is up to |
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* The first ckpool message allows us to know where ckpool is up to |
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* in the CCLs and thus where to stop processing the CCLs to stay in |
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* in the CCLs - see reload_from() for how this is handled |
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* sync with ckpool |
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* If ckpool isn't running, then the reload will complete at the end of |
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* the last CCL file, however if the 1st message arrives from ckpool while |
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* processing the CCLs, that will mark the point where to stop processing |
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* but can also produce a fatal error at the end of processing, reporting |
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* the ckpool message, if the message was not found in the CCL processing |
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* after the message was received |
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* This can be caused by two circumstances: |
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* 1) the disk had not yet written it to the CCL when ckdb read EOF and |
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* ckpool was started at about the same time as the reload completed. |
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* This can be seen if the message displayed in the fatal error IS NOT |
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* in ckdb's message logfile. |
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* A ckdb restart will resolve this |
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* 2) ckpool was started at the time of the end of the reload, but the |
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* message was written to disk and found in the CCL before it was |
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* processed in the message queue. |
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* This can be seen if the message displayed in the fatal error IS in |
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* ckdb's message logfile and means the messages after it in ckdb's |
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* message logfile have already been processed. |
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* Again, a ckdb restart will resolve this |
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* In both the above (very rare) cases, if ckdb was to continue running, |
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* it would break the synchronisation and could cause DB problems, so |
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* ckdb aborting and needing a complete restart resolves it |
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* The users table, required for the authorise messages, is always updated |
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* The users table, required for the authorise messages, is always updated |
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* immediately |
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* immediately |
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*/ |
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*/ |
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