liubao68 commented on a change in pull request #1161: [SCB-1232] make
GroupExecutor configuration compatible to old version
URL:
https://github.com/apache/servicecomb-java-chassis/pull/1161#discussion_r270733331
##########
File path:
core/src/main/java/org/apache/servicecomb/core/executor/GroupExecutor.java
##########
@@ -83,25 +83,31 @@ public void init() {
}
public void initConfig() {
- groupCount =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_GROUP, 2).get();
- coreThreads =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_CORE_THREADS, 25).get();
-
- maxThreads =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_MAX_THREADS, -1).get();
- if (maxThreads <= 0) {
- maxThreads =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_THREAD, -1).get();
- if (maxThreads > 0) {
- LOGGER.warn("{} is deprecated, recommended to use {}.", KEY_THREAD,
KEY_MAX_THREADS);
- } else {
- maxThreads = 100;
- }
- }
- if (coreThreads > maxThreads) {
- LOGGER.warn("coreThreads is bigger than maxThreads, change from {} to
{}.", coreThreads, maxThreads);
+ LOGGER.info("JDK standard thread pool rules:\n"
+ + "1.use core threads.\n"
+ + "2.if all core threads are busy, then queue the request.\n"
+ + "3.if queue is full, then create new thread util reach the limit of
max threads.\n"
+ + "4.if queue is full, and threads count is max, then reject the
request.");
+
+ // the complex logic is to keep compatible
+ // otherwise can throw exception if configuration is invalid.
+ coreThreads =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_CORE_THREADS, -1).get();
+
+ int oldMaxThreads =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_OLD_MAX_THREAD,
-1).get();
+ maxThreads =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_MAX_THREADS,
oldMaxThreads).get();
+ maxThreads = Math.max(coreThreads, maxThreads);
+ maxThreads = maxThreads <= 0 ? 100 : maxThreads;
+
+ maxQueueSize =
DynamicPropertyFactory.getInstance().getIntProperty(KEY_MAX_QUEUE_SIZE,
Integer.MAX_VALUE).get();
+ if (maxQueueSize == Integer.MAX_VALUE) {
coreThreads = maxThreads;
+ LOGGER.info("not configured {}, make coreThreads and maxThreads to be
{}.", KEY_MAX_QUEUE_SIZE, maxThreads);
+ } else {
+ coreThreads = coreThreads <= 0 ? 25 : coreThreads;
Review comment:
This statement should be calculated before
maxThreads = Math.max(coreThreads, maxThreads);
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