mikewalch commented on a change in pull request #383: ACCUMULO-4809 Avoid
blocking during session cleanup
URL: https://github.com/apache/accumulo/pull/383#discussion_r168228686
##########
File path:
server/tserver/src/main/java/org/apache/accumulo/tserver/session/SessionManager.java
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@@ -169,36 +169,36 @@ public Session removeSession(long sessionId, boolean
unreserve) {
}
private void sweep(final long maxIdle, final long maxUpdateIdle) {
- List<Session> sessionsToCleanup = new ArrayList<>();
- synchronized (this) {
- Iterator<Session> iter = sessions.values().iterator();
- while (iter.hasNext()) {
- Session session = iter.next();
- long configuredIdle = maxIdle;
- if (session instanceof UpdateSession) {
- configuredIdle = maxUpdateIdle;
- }
- long idleTime = System.currentTimeMillis() - session.lastAccessTime;
- if (idleTime > configuredIdle && !session.reserved) {
- log.info("Closing idle session from user=" + session.getUser() + ",
client=" + session.client + ", idle=" + idleTime + "ms");
- iter.remove();
- sessionsToCleanup.add(session);
+ synchronized (idleSessions) {
Review comment:
why do you have a synchronized block on `idleSessions` with the other blocks
removed? Is this to prevent multiple interleaving calls to sweep?
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