AKI-672: Call repository close on main instance#1126
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AlexandraRoatis merged 1 commit intomasterfrom Mar 6, 2020
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| @Override | ||
| public synchronized void close() { | ||
| while (repository.isSnapshot()) { | ||
| popState(); |
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Does the kernel flush the DB before the shutdown process? If the answer is no, why we do popState?
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The main repository instance is stashed when the snapshot is created. If the current repository is a snapshot that means the main one is in the stack. So we need to pop the stack until we get to the main repository instance that contains access too all the databases that must be closed.
If the close was called under normal circumstances the repository was already flushed. If it was called due to an error (like a VM issue) then flushing may store corrupt data, so it shouldn't be done.
When the close method is called due to a critical error the databases that are not copied into a snapshot may remain open. This is because during execution the main repository can be stashed while a snapshot is used for the block import.
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