gavinchou commented on code in PR #40160:
URL: https://github.com/apache/doris/pull/40160#discussion_r1737852468
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fe/fe-core/src/main/java/org/apache/doris/catalog/Env.java:
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@@ -1679,10 +1679,13 @@ private void transferToMaster() {
*/
void advanceNextId() {
long currentId = idGenerator.getBatchEndId();
- long currentNanos = System.nanoTime();
+ long currentMill = System.currentTimeMillis();
long nextId = currentId + 1;
- if (nextId < currentNanos) {
- nextId = currentNanos;
+ // Reserve at most 8 billion for use in case of bugs or frequent
reboots (21 billion reboots)
+ if ((1L << 63) - nextId < (1L << 33)) {
+ LOG.warn("nextId is too large: {}, it may be a bug and consider
backup and migration", nextId);
+ } else {
+ nextId = (currentId + 1) < currentMill ? currentMill : currentId +
(1L << 32);
Review Comment:
```suggestion
// Keep compatible with previous impl, the previous impl may
result in extreme large nextId,
// and guess there are no more than 1L<<32 (~4e9) ids used since
last reboot
nextId = (currentId + 1) < currentMill ? currentMill : currentId
+ (1L << 32);
```
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