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HADOOP-10404. Some accesses to DomainSocketWatcher#closed are not protected by the lock (cmccabe)

This commit is contained in:
Colin Patrick Mccabe 2014-10-06 14:40:41 -07:00
parent 522b6505f4
commit 204148f0d4
2 changed files with 15 additions and 5 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
View File

@ -447,6 +447,9 @@ Release 2.6.0 - UNRELEASED
HADOOP-11169. Fix DelegationTokenAuthenticatedURL to pass the connection
Configurator to the authenticator. (Arun Suresh via wang)
HADOOP-10404. Some accesses to DomainSocketWatcher#closed are not protected
by lock (cmccabe)
BREAKDOWN OF HDFS-6134 AND HADOOP-10150 SUBTASKS AND RELATED JIRAS
HADOOP-10734. Implement high-performance secure random number sources.

17
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/unix/DomainSocketWatcher.java
View File

@ -101,6 +101,7 @@ public final class DomainSocketWatcher implements Closeable {
*/
private class NotificationHandler implements Handler {
public boolean handle(DomainSocket sock) {
assert(lock.isHeldByCurrentThread());
try {
if (LOG.isTraceEnabled()) {
LOG.trace(this + ": NotificationHandler: doing a read on " +
@ -346,6 +347,7 @@ public final class DomainSocketWatcher implements Closeable {
* Wake up the DomainSocketWatcher thread.
*/
private void kick() {
assert(lock.isHeldByCurrentThread());
try {
notificationSockets[0].getOutputStream().write(0);
} catch (IOException e) {
@ -461,12 +463,17 @@ public final class DomainSocketWatcher implements Closeable {
} catch (IOException e) {
LOG.error(toString() + " terminating on IOException", e);
} finally {
kick(); // allow the handler for notificationSockets[0] to read a byte
for (Entry entry : entries.values()) {
sendCallback("close", entries, fdSet, entry.getDomainSocket().fd);
lock.lock();
try {
kick(); // allow the handler for notificationSockets[0] to read a byte
for (Entry entry : entries.values()) {
sendCallback("close", entries, fdSet, entry.getDomainSocket().fd);
}
entries.clear();
fdSet.close();
} finally {
lock.unlock();
}
entries.clear();
fdSet.close();
}
}
});