bharathv commented on a change in pull request #1373: HBASE-24052 Add debug+fix
to TestMasterShutdown
URL: https://github.com/apache/hbase/pull/1373#discussion_r399546754
##########
File path:
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterShutdown.java
##########
@@ -156,48 +151,19 @@ public void
testMasterShutdownBeforeStartingAnyRegionServer() throws Exception {
hbaseCluster = new LocalHBaseCluster(htu.getConfiguration(),
options.getNumMasters(),
options.getNumRegionServers(), options.getMasterClass(),
options.getRsClass());
final MasterThread masterThread = hbaseCluster.getMasters().get(0);
-
- final CompletableFuture<Void> shutdownFuture =
CompletableFuture.runAsync(() -> {
- // Switching to master registry exacerbated a race in the master
bootstrap that can result
- // in a lost shutdown command (HBASE-8422, HBASE-23836). The race is
essentially because
- // the server manager in HMaster is not initialized by the time
shutdown() RPC (below) is
- // made to the master. The suspected reason as to why it was uncommon
before HBASE-18095
- // is because the connection creation with ZK registry is so slow that
by then the server
- // manager is usually init'ed in time for the RPC to be made. For now,
adding an explicit
- // wait() in the test, waiting for the server manager to become
available.
- final long timeout = TimeUnit.MINUTES.toMillis(10);
- assertNotEquals("timeout waiting for server manager to become
available.",
- -1, Waiter.waitFor(htu.getConfiguration(), timeout,
- () -> masterThread.getMaster().getServerManager() != null));
-
- // Master has come up far enough that we can terminate it without
creating a zombie.
- final long result = Waiter.waitFor(htu.getConfiguration(), timeout,
500, () -> {
- final Configuration conf =
createResponsiveZkConfig(htu.getConfiguration());
- LOG.debug("Attempting to establish connection.");
- final CompletableFuture<AsyncConnection> connFuture =
- ConnectionFactory.createAsyncConnection(conf);
- try (final AsyncConnection conn = connFuture.join()) {
- LOG.debug("Sending shutdown RPC.");
- try {
- conn.getAdmin().shutdown().join();
- LOG.debug("Shutdown RPC sent.");
- return true;
- } catch (CompletionException e) {
- LOG.debug("Failure sending shutdown RPC.");
- }
- } catch (IOException|CompletionException e) {
- LOG.debug("Failed to establish connection.");
- } catch (Throwable e) {
- LOG.info("Something unexpected happened.", e);
- }
- return false;
- });
- assertNotEquals("Failed to issue shutdown RPC after " +
Duration.ofMillis(timeout),
- -1, result);
- });
-
masterThread.start();
- shutdownFuture.join();
+ // Switching to master registry exacerbated a race in the master
bootstrap that can result
+ // in a lost shutdown command (HBASE-8422, HBASE-23836). The race is
essentially because
+ // the server manager in HMaster is not initialized by the time
shutdown() RPC (below) is
+ // made to the master. The suspected reason as to why it was uncommon
before HBASE-18095
+ // is because the connection creation with ZK registry is so slow that
by then the server
+ // manager is usually init'ed in time for the RPC to be made. For now,
adding an explicit
+ // wait() in the test, waiting for the server manager to become
available.
+ final long timeout = TimeUnit.MINUTES.toMillis(10);
+ assertNotEquals("Timeout waiting for server manager to become
available.",
+ -1, Waiter.waitFor(htu.getConfiguration(), timeout,
+ () -> masterThread.getMaster().getServerManager() != null));
+ htu.getConnection().getAdmin().shutdown();
Review comment:
Thanks for the jira, I'll try to poke around too a little bit to see if I
can find something. Fwiw, I think a small comment detailing this finding with a
jira reference would be helpful. Thanks.
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