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fix: use double check to fix concurrent problem (#1909)

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Co-authored-by: zhangwenhe <zhangwh@ehualu.com>
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Zhang WH 2021-11-12 01:46:24 +08:00 committed by GitHub
parent 0a7b524bd1
commit 89b2072131
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1 changed files with 4 additions and 2 deletions
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6
leader-followers/src/main/java/com/iluwatar/leaderfollowers/Worker.java
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@ -57,9 +57,11 @@ public class Worker implements Runnable {
try { try {
if (workCenter.getLeader() != null && !workCenter.getLeader().equals(this)) { if (workCenter.getLeader() != null && !workCenter.getLeader().equals(this)) {
synchronized (workCenter) { synchronized (workCenter) {
workCenter.wait(); if (workCenter.getLeader() != null && !workCenter.getLeader().equals(this)) {
workCenter.wait();
continue;
}
} }
continue;
} }
final Task task = taskSet.getTask(); final Task task = taskSet.getTask();
synchronized (workCenter) { synchronized (workCenter) {