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Don't allow latest blocks cache to be empty

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catbref 2020-11-02 10:45:21 +00:00
parent d2a92db921
commit 88da8d949f
1 changed files with 9 additions and 2 deletions
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11
src/main/java/org/qortal/controller/Controller.java
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@ -926,7 +926,7 @@ public class Controller extends Thread {
this.latestBlocks.addLast(latestBlockData);
// Trim if necessary
if (latestBlockData.getHeight() - this.latestBlocks.peekFirst().getHeight() >= BLOCK_CACHE_SIZE)
if (this.latestBlocks.size() >= BLOCK_CACHE_SIZE)
this.latestBlocks.pollFirst();
} else {
if (cachedChainTip != null)
@ -974,9 +974,13 @@ public class Controller extends Thread {
synchronized (this.latestBlocks) {
BlockData cachedChainTip = this.latestBlocks.pollLast();
boolean refillNeeded = false;
if (cachedChainTip != null && Arrays.equals(cachedChainTip.getReference(), blockDataCopy.getSignature())) {
// Chain tip was parent for new latest block that has been orphaned, so we're good
// However, if we've emptied the cache then we will need to refill it
refillNeeded = this.latestBlocks.isEmpty();
} else {
if (cachedChainTip != null)
// Chain tip didn't match - potentially abnormal behaviour?
@ -986,6 +990,10 @@ public class Controller extends Thread {
Base58.encode(blockDataCopy.getSignature())));
// Defensively rebuild cache
refillNeeded = true;
}
if (refillNeeded)
try {
this.stats.latestBlocksCacheRefills.incrementAndGet();
@ -994,7 +1002,6 @@ public class Controller extends Thread {
LOGGER.warn(() -> "Couldn't refill latest blocks cache?", e);
}
}
}
this.onNewOrOrphanedBlock(blockDataCopy, OrphanedBlockEvent::new);
}