shanghaifei opened a new issue #3962:
URL: https://github.com/apache/rocketmq/issues/3962
**in store module，org/apache/rocketmq/store/MappedFile.java**
```
protected boolean isAbleToCommit(final int commitLeastPages) {
// this is commit position，not flush position
// int flush = this.committedPosition.get();
int commit = this.committedPosition.get();
int write = this.wrotePosition.get();
if (this.isFull()) {
return true;
}
if (commitLeastPages > 0) {
//return ((write / OS_PAGE_SIZE) - (flush / OS_PAGE_SIZE)) >=
commitLeastPages;
return ((write / OS_PAGE_SIZE) - (commit / OS_PAGE_SIZE)) >=
commitLeastPages;
}
//return write > flush;
return write > commit;
}
```
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