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Posted to commits@hbase.apache.org by st...@apache.org on 2015/09/04 06:33:36 UTC
[1/2] hbase git commit: HBASE-14317 Stuck FSHLog: bad disk
(HDFS-8960) and can't roll WAL
Repository: hbase
Updated Branches:
refs/heads/master 2481b7f76 -> 661faf6fe
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
index 651f7b2..9ecd408 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
@@ -90,10 +90,6 @@ public class TestLogRolling {
private MiniHBaseCluster cluster;
private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
- /**
- * constructor
- * @throws Exception
- */
public TestLogRolling() {
this.server = null;
this.tableName = null;
@@ -529,7 +525,16 @@ public class TestLogRolling {
// flush all regions
for (Region r: server.getOnlineRegionsLocalContext()) {
- r.flush(true);
+ try {
+ r.flush(true);
+ } catch (Exception e) {
+ // This try/catch was added by HBASE-14317. It is needed
+ // because this issue tightened up the semantic such that
+ // a failed append could not be followed by a successful
+ // sync. What is coming out here is a failed sync, a sync
+ // that used to 'pass'.
+ LOG.info(e);
+ }
}
ResultScanner scanner = table.getScanner(new Scan());
[2/2] hbase git commit: HBASE-14317 Stuck FSHLog: bad disk
(HDFS-8960) and can't roll WAL
Posted by st...@apache.org.
HBASE-14317 Stuck FSHLog: bad disk (HDFS-8960) and can't roll WAL
Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/661faf6f
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/661faf6f
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/661faf6f
Branch: refs/heads/master
Commit: 661faf6fe0833726d7ce7ad44a829eba3f8e3e45
Parents: 2481b7f
Author: stack <st...@apache.org>
Authored: Thu Sep 3 21:20:21 2015 -0700
Committer: stack <st...@apache.org>
Committed: Thu Sep 3 21:32:49 2015 -0700
----------------------------------------------------------------------
.../org/apache/hadoop/hbase/io/hfile/HFile.java | 3 +-
.../hadoop/hbase/regionserver/HRegion.java | 99 ++++---
.../hadoop/hbase/regionserver/LogRoller.java | 16 +-
.../MultiVersionConcurrencyControl.java | 24 +-
.../regionserver/wal/DamagedWALException.java | 45 +++
.../hadoop/hbase/regionserver/wal/FSHLog.java | 122 ++++++--
.../hbase/regionserver/wal/FSWALEntry.java | 2 +-
.../hadoop/hbase/regionserver/wal/HLogKey.java | 4 +
.../regionserver/wal/ProtobufLogReader.java | 9 +-
.../regionserver/wal/ProtobufLogWriter.java | 2 +-
.../hbase/regionserver/wal/SyncFuture.java | 4 +-
.../org/apache/hadoop/hbase/wal/WALKey.java | 22 +-
.../hbase/regionserver/TestFSErrorsExposed.java | 17 +-
.../regionserver/TestFailedAppendAndSync.java | 254 ++++++++++++++++
.../hadoop/hbase/regionserver/TestHRegion.java | 92 ++++--
.../TestMultiVersionConcurrencyControl.java | 4 +-
...TestMultiVersionConcurrencyControlBasic.java | 63 ++++
.../hbase/regionserver/TestWALLockup.java | 289 +++++++++++++++++++
.../hbase/regionserver/wal/TestLogRolling.java | 15 +-
19 files changed, 959 insertions(+), 127 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
index 7dbad6c..b71bc64 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
@@ -305,7 +305,8 @@ public class HFile {
try {
ostream.setDropBehind(shouldDropBehind && cacheConf.shouldDropBehindCompaction());
} catch (UnsupportedOperationException uoe) {
- LOG.debug("Unable to set drop behind on " + path, uoe);
+ if (LOG.isTraceEnabled()) LOG.trace("Unable to set drop behind on " + path, uoe);
+ else if (LOG.isDebugEnabled()) LOG.debug("Unable to set drop behind on " + path);
}
}
return createWriter(fs, path, ostream,
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
index e21942c..2c145b4 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
@@ -77,6 +77,7 @@ import org.apache.hadoop.hbase.CompoundConfiguration;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.DroppedSnapshotException;
import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.HBaseIOException;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HConstants.OperationStatusCode;
@@ -204,11 +205,15 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
public static final String LOAD_CFS_ON_DEMAND_CONFIG_KEY =
"hbase.hregion.scan.loadColumnFamiliesOnDemand";
- // in milliseconds
- private static final String MAX_WAIT_FOR_SEQ_ID_KEY =
- "hbase.hregion.max.wait.for.seq.id";
-
- private static final int DEFAULT_MAX_WAIT_FOR_SEQ_ID = 60000;
+ /**
+ * Longest time we'll wait on a sequenceid.
+ * Sequenceid comes up out of the WAL subsystem. WAL subsystem can go bad or a test might use
+ * it without cleanup previous usage properly; generally, a WAL roll is needed.
+ * Key to use changing the default of 30000ms.
+ */
+ private final int maxWaitForSeqId;
+ private static final String MAX_WAIT_FOR_SEQ_ID_KEY = "hbase.hregion.max.wait.for.sequenceid.ms";
+ private static final int DEFAULT_MAX_WAIT_FOR_SEQ_ID = 30000;
/**
* This is the global default value for durability. All tables/mutations not
@@ -241,7 +246,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
* file in this sequence id's order; i.e. edit #2 will be in the WAL after edit #1.
* Its default value is -1L. This default is used as a marker to indicate
* that the region hasn't opened yet. Once it is opened, it is set to the derived
- * {@link #openSeqNum}, the largest sequence id of all hfiles opened under this Region.
+ * #openSeqNum, the largest sequence id of all hfiles opened under this Region.
*
* <p>Control of this sequence is handed off to the WAL implementation. It is responsible
* for tagging edits with the correct sequence id since it is responsible for getting the
@@ -340,7 +345,6 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
*/
private boolean isLoadingCfsOnDemandDefault = false;
- private int maxWaitForSeqId;
private final AtomicInteger majorInProgress = new AtomicInteger(0);
private final AtomicInteger minorInProgress = new AtomicInteger(0);
@@ -677,7 +681,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
this.rowLockWaitDuration = conf.getInt("hbase.rowlock.wait.duration",
DEFAULT_ROWLOCK_WAIT_DURATION);
- maxWaitForSeqId = conf.getInt(MAX_WAIT_FOR_SEQ_ID_KEY, DEFAULT_MAX_WAIT_FOR_SEQ_ID);
+ this.maxWaitForSeqId = conf.getInt(MAX_WAIT_FOR_SEQ_ID_KEY, DEFAULT_MAX_WAIT_FOR_SEQ_ID);
this.isLoadingCfsOnDemandDefault = conf.getBoolean(LOAD_CFS_ON_DEMAND_CONFIG_KEY, true);
this.htableDescriptor = htd;
this.rsServices = rsServices;
@@ -2141,7 +2145,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// to do this for a moment. It is quick. We also set the memstore size to zero here before we
// allow updates again so its value will represent the size of the updates received
// during flush
- MultiVersionConcurrencyControl.WriteEntry w = null;
+ MultiVersionConcurrencyControl.WriteEntry writeEntry = null;
// We have to take an update lock during snapshot, or else a write could end up in both snapshot
// and memstore (makes it difficult to do atomic rows then)
status.setStatus("Obtaining lock to block concurrent updates");
@@ -2174,7 +2178,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
long trxId = 0;
try {
try {
- w = mvcc.beginMemstoreInsert();
+ writeEntry = mvcc.beginMemstoreInsert();
if (wal != null) {
Long earliestUnflushedSequenceIdForTheRegion =
wal.startCacheFlush(encodedRegionName, flushedFamilyNames);
@@ -2247,8 +2251,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
try {
wal.sync(); // ensure that flush marker is sync'ed
} catch (IOException ioe) {
- LOG.warn("Unexpected exception while wal.sync(), ignoring. Exception: "
- + StringUtils.stringifyException(ioe));
+ wal.abortCacheFlush(this.getRegionInfo().getEncodedNameAsBytes());
+ throw ioe;
}
}
@@ -2257,14 +2261,14 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// uncommitted transactions from being written into HFiles.
// We have to block before we start the flush, otherwise keys that
// were removed via a rollbackMemstore could be written to Hfiles.
- w.setWriteNumber(flushOpSeqId);
- mvcc.waitForPreviousTransactionsComplete(w);
+ writeEntry.setWriteNumber(flushOpSeqId);
+ mvcc.waitForPreviousTransactionsComplete(writeEntry);
// set w to null to prevent mvcc.advanceMemstore from being called again inside finally block
- w = null;
+ writeEntry = null;
} finally {
- if (w != null) {
- // in case of failure just mark current w as complete
- mvcc.advanceMemstore(w);
+ if (writeEntry != null) {
+ // in case of failure just mark current writeEntry as complete
+ mvcc.advanceMemstore(writeEntry);
}
}
return new PrepareFlushResult(storeFlushCtxs, committedFiles, storeFlushableSize, startTime, flushOpSeqId,
@@ -2446,8 +2450,14 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
*/
@VisibleForTesting
protected long getNextSequenceId(final WAL wal) throws IOException {
+ // TODO: For review. Putting an empty edit in to get a sequenceid out will not work if the
+ // WAL is banjaxed... if it has gotten an exception and the WAL has not yet been rolled or
+ // aborted. In this case, we'll just get stuck here. For now, until HBASE-12751, just have
+ // a timeout. May happen in tests after we tightened the semantic via HBASE-14317.
+ // Also, the getSequenceId blocks on a latch. There is no global list of outstanding latches
+ // so if an abort or stop, there is no way to call them in.
WALKey key = this.appendEmptyEdit(wal, null);
- return key.getSequenceId(maxWaitForSeqId);
+ return key.getSequenceId(this.maxWaitForSeqId);
}
//////////////////////////////////////////////////////////////////////////////
@@ -2866,7 +2876,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
long currentNonceGroup = HConstants.NO_NONCE, currentNonce = HConstants.NO_NONCE;
WALEdit walEdit = new WALEdit(isInReplay);
- MultiVersionConcurrencyControl.WriteEntry w = null;
+ MultiVersionConcurrencyControl.WriteEntry writeEntry = null;
long txid = 0;
boolean doRollBackMemstore = false;
boolean locked = false;
@@ -3019,7 +3029,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// ------------------------------------
// Acquire the latest mvcc number
// ----------------------------------
- w = mvcc.beginMemstoreInsertWithSeqNum(mvccNum);
+ writeEntry = mvcc.beginMemstoreInsertWithSeqNum(mvccNum);
// calling the pre CP hook for batch mutation
if (!isInReplay && coprocessorHost != null) {
@@ -3134,7 +3144,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
txid = this.wal.append(this.htableDescriptor, this.getRegionInfo(), walKey, walEdit,
getSequenceId(), true, memstoreCells);
}
- if(walKey == null){
+ if (walKey == null){
// Append a faked WALEdit in order for SKIP_WAL updates to get mvcc assigned
walKey = this.appendEmptyEdit(this.wal, memstoreCells);
}
@@ -3168,9 +3178,9 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// ------------------------------------------------------------------
// STEP 8. Advance mvcc. This will make this put visible to scanners and getters.
// ------------------------------------------------------------------
- if (w != null) {
- mvcc.completeMemstoreInsertWithSeqNum(w, walKey);
- w = null;
+ if (writeEntry != null) {
+ mvcc.completeMemstoreInsertWithSeqNum(writeEntry, walKey);
+ writeEntry = null;
}
// ------------------------------------
@@ -3199,9 +3209,9 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// if the wal sync was unsuccessful, remove keys from memstore
if (doRollBackMemstore) {
rollbackMemstore(memstoreCells);
- }
- if (w != null) {
- mvcc.completeMemstoreInsertWithSeqNum(w, walKey);
+ if (writeEntry != null) mvcc.cancelMemstoreInsert(writeEntry);
+ } else if (writeEntry != null) {
+ mvcc.completeMemstoreInsertWithSeqNum(writeEntry, walKey);
}
if (locked) {
@@ -6735,6 +6745,9 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
processor.postBatchMutate(this);
}
} finally {
+ // TODO: Make this method look like all other methods that are doing append/sync and
+ // memstore rollback such as append and doMiniBatchMutation. Currently it is a little
+ // different. Make them all share same code!
if (!mutations.isEmpty() && !walSyncSuccessful) {
LOG.warn("Wal sync failed. Roll back " + mutations.size() +
" memstore keyvalues for row(s):" + StringUtils.byteToHexString(
@@ -6745,6 +6758,10 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
getStore(cell).rollback(cell);
}
}
+ if (writeEntry != null) {
+ mvcc.cancelMemstoreInsert(writeEntry);
+ writeEntry = null;
+ }
}
// 13. Roll mvcc forward
if (writeEntry != null) {
@@ -6846,7 +6863,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
startRegionOperation(Operation.APPEND);
this.writeRequestsCount.increment();
long mvccNum = 0;
- WriteEntry w = null;
+ WriteEntry writeEntry = null;
WALKey walKey = null;
RowLock rowLock = null;
List<Cell> memstoreCells = new ArrayList<Cell>();
@@ -6867,7 +6884,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
}
// now start my own transaction
mvccNum = MultiVersionConcurrencyControl.getPreAssignedWriteNumber(this.sequenceId);
- w = mvcc.beginMemstoreInsertWithSeqNum(mvccNum);
+ writeEntry = mvcc.beginMemstoreInsertWithSeqNum(mvccNum);
long now = EnvironmentEdgeManager.currentTime();
// Process each family
for (Map.Entry<byte[], List<Cell>> family : append.getFamilyCellMap().entrySet()) {
@@ -7049,10 +7066,11 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// if the wal sync was unsuccessful, remove keys from memstore
if (doRollBackMemstore) {
rollbackMemstore(memstoreCells);
+ if (writeEntry != null) mvcc.cancelMemstoreInsert(writeEntry);
+ } else if (writeEntry != null) {
+ mvcc.completeMemstoreInsertWithSeqNum(writeEntry, walKey);
}
- if (w != null) {
- mvcc.completeMemstoreInsertWithSeqNum(w, walKey);
- }
+
closeRegionOperation(Operation.APPEND);
}
@@ -7099,7 +7117,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
startRegionOperation(Operation.INCREMENT);
this.writeRequestsCount.increment();
RowLock rowLock = null;
- WriteEntry w = null;
+ WriteEntry writeEntry = null;
WALKey walKey = null;
long mvccNum = 0;
List<Cell> memstoreCells = new ArrayList<Cell>();
@@ -7120,7 +7138,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
}
// now start my own transaction
mvccNum = MultiVersionConcurrencyControl.getPreAssignedWriteNumber(this.sequenceId);
- w = mvcc.beginMemstoreInsertWithSeqNum(mvccNum);
+ writeEntry = mvcc.beginMemstoreInsertWithSeqNum(mvccNum);
long now = EnvironmentEdgeManager.currentTime();
// Process each family
for (Map.Entry<byte [], List<Cell>> family:
@@ -7290,9 +7308,9 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// if the wal sync was unsuccessful, remove keys from memstore
if (doRollBackMemstore) {
rollbackMemstore(memstoreCells);
- }
- if (w != null) {
- mvcc.completeMemstoreInsertWithSeqNum(w, walKey);
+ if (writeEntry != null) mvcc.cancelMemstoreInsert(writeEntry);
+ } else if (writeEntry != null) {
+ mvcc.completeMemstoreInsertWithSeqNum(writeEntry, walKey);
}
closeRegionOperation(Operation.INCREMENT);
if (this.metricsRegion != null) {
@@ -7984,12 +8002,13 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
*/
private WALKey appendEmptyEdit(final WAL wal, List<Cell> cells) throws IOException {
// we use HLogKey here instead of WALKey directly to support legacy coprocessors.
+ @SuppressWarnings("deprecation")
WALKey key = new HLogKey(getRegionInfo().getEncodedNameAsBytes(), getRegionInfo().getTable(),
WALKey.NO_SEQUENCE_ID, 0, null, HConstants.NO_NONCE, HConstants.NO_NONCE);
// Call append but with an empty WALEdit. The returned seqeunce id will not be associated
// with any edit and we can be sure it went in after all outstanding appends.
- wal.append(getTableDesc(), getRegionInfo(), key,
- WALEdit.EMPTY_WALEDIT, this.sequenceId, false, cells);
+ wal.append(getTableDesc(), getRegionInfo(), key, WALEdit.EMPTY_WALEDIT, getSequenceId(), false,
+ cells);
return key;
}
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java
index 7649ac9..1a20d81 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java
@@ -100,6 +100,15 @@ public class LogRoller extends HasThread {
}
@Override
+ public void interrupt() {
+ // Wake up if we are waiting on rollLog. For tests.
+ synchronized (rollLog) {
+ this.rollLog.notify();
+ }
+ super.interrupt();
+ }
+
+ @Override
public void run() {
while (!server.isStopped()) {
long now = System.currentTimeMillis();
@@ -109,7 +118,9 @@ public class LogRoller extends HasThread {
if (!periodic) {
synchronized (rollLog) {
try {
- if (!rollLog.get()) rollLog.wait(this.threadWakeFrequency);
+ if (!rollLog.get()) {
+ rollLog.wait(this.threadWakeFrequency);
+ }
} catch (InterruptedException e) {
// Fall through
}
@@ -180,5 +191,4 @@ public class LogRoller extends HasThread {
requester);
}
}
-
-}
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
index 028d81a..2d65387 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
@@ -79,10 +79,11 @@ public class MultiVersionConcurrencyControl {
// current MVCC completes. Theoretically the bump only needs to be 2 * the number of handlers
// because each handler could increment sequence num twice and max concurrent in-flight
// transactions is the number of RPC handlers.
- // we can't use Long.MAX_VALUE because we still want to maintain the ordering when multiple
- // changes touch same row key
+ // We can't use Long.MAX_VALUE because we still want to maintain the ordering when multiple
+ // changes touch same row key.
// If for any reason, the bumped value isn't reset due to failure situations, we'll reset
- // curSeqNum to NO_WRITE_NUMBER in order NOT to advance memstore read point at all
+ // curSeqNum to NO_WRITE_NUMBER in order NOT to advance memstore read point at all.
+ // St.Ack 20150901 Where is the reset to NO_WRITE_NUMBER done?
return sequenceId.incrementAndGet() + 1000000000;
}
@@ -128,6 +129,23 @@ public class MultiVersionConcurrencyControl {
}
/**
+ * Cancel a write insert that failed.
+ * Removes the write entry without advancing read point or without interfering with write
+ * entries queued behind us. It is like #advanceMemstore(WriteEntry) only this method
+ * will move the read point to the sequence id that is in WriteEntry even if it ridiculous (see
+ * the trick in HRegion where we call {@link #getPreAssignedWriteNumber(AtomicLong)} just to mark
+ * it as for special handling).
+ * @param writeEntry Failed attempt at write. Does cleanup.
+ */
+ public void cancelMemstoreInsert(WriteEntry writeEntry) {
+ // I'm not clear on how this voodoo all works but setting write number to -1 does NOT advance
+ // readpoint and gets my little writeEntry completed and removed from queue of outstanding
+ // events which seems right. St.Ack 20150901.
+ writeEntry.setWriteNumber(NO_WRITE_NUMBER);
+ advanceMemstore(writeEntry);
+ }
+
+ /**
* Complete a {@link WriteEntry} that was created by {@link #beginMemstoreInsert()}. At the
* end of this call, the global read point is at least as large as the write point of the passed
* in WriteEntry. Thus, the write is visible to MVCC readers.
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/DamagedWALException.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/DamagedWALException.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/DamagedWALException.java
new file mode 100644
index 0000000..6c57f56
--- /dev/null
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/DamagedWALException.java
@@ -0,0 +1,45 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.regionserver.wal;
+
+import org.apache.hadoop.hbase.HBaseIOException;
+import org.apache.hadoop.hbase.classification.InterfaceAudience;
+
+/**
+ * Thrown when a failed append or sync on a WAL.
+ * Thrown when WAL can no longer be used. Roll the WAL.
+ */
+@SuppressWarnings("serial")
+@InterfaceAudience.Private
+public class DamagedWALException extends HBaseIOException {
+ public DamagedWALException() {
+ super();
+ }
+
+ public DamagedWALException(String message) {
+ super(message);
+ }
+
+ public DamagedWALException(String message, Throwable cause) {
+ super(message, cause);
+ }
+
+ public DamagedWALException(Throwable cause) {
+ super(cause);
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
index fa69d63..5708c30 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
@@ -111,6 +111,16 @@ import com.lmax.disruptor.dsl.ProducerType;
*
* <p>To read an WAL, call {@link WALFactory#createReader(org.apache.hadoop.fs.FileSystem,
* org.apache.hadoop.fs.Path)}.
+ *
+ * <h2>Failure Semantic</h2>
+ * If an exception on append or sync, roll the WAL because the current WAL is now a lame duck;
+ * any more appends or syncs will fail also with the same original exception. If we have made
+ * successful appends to the WAL and we then are unable to sync them, our current semantic is to
+ * return error to the client that the appends failed but also to abort the current context,
+ * usually the hosting server. We need to replay the WALs. TODO: Change this semantic. A roll of
+ * WAL may be sufficient as long as we have flagged client that the append failed. TODO:
+ * replication may pick up these last edits though they have been marked as failed append (Need to
+ * keep our own file lengths, not rely on HDFS).
*/
@InterfaceAudience.Private
public class FSHLog implements WAL {
@@ -344,7 +354,7 @@ public class FSHLog implements WAL {
* WAL Comparator; it compares the timestamp (log filenum), present in the log file name.
* Throws an IllegalArgumentException if used to compare paths from different wals.
*/
- public final Comparator<Path> LOG_NAME_COMPARATOR = new Comparator<Path>() {
+ final Comparator<Path> LOG_NAME_COMPARATOR = new Comparator<Path>() {
@Override
public int compare(Path o1, Path o2) {
long t1 = getFileNumFromFileName(o1);
@@ -448,7 +458,7 @@ public class FSHLog implements WAL {
prefix == null || prefix.isEmpty() ? "wal" : URLEncoder.encode(prefix, "UTF8");
// we only correctly differentiate suffices when numeric ones start with '.'
if (suffix != null && !(suffix.isEmpty()) && !(suffix.startsWith(WAL_FILE_NAME_DELIMITER))) {
- throw new IllegalArgumentException("wal suffix must start with '" + WAL_FILE_NAME_DELIMITER +
+ throw new IllegalArgumentException("WAL suffix must start with '" + WAL_FILE_NAME_DELIMITER +
"' but instead was '" + suffix + "'");
}
// Now that it exists, set the storage policy for the entire directory of wal files related to
@@ -572,7 +582,9 @@ public class FSHLog implements WAL {
*/
@VisibleForTesting
OutputStream getOutputStream() {
- return this.hdfs_out.getWrappedStream();
+ FSDataOutputStream fsdos = this.hdfs_out;
+ if (fsdos == null) return null;
+ return fsdos.getWrappedStream();
}
@Override
@@ -758,6 +770,19 @@ public class FSHLog implements WAL {
}
/**
+ * Used to manufacture race condition reliably. For testing only.
+ * @see #beforeWaitOnSafePoint()
+ */
+ @VisibleForTesting
+ protected void afterCreatingZigZagLatch() {}
+
+ /**
+ * @see #afterCreatingZigZagLatch()
+ */
+ @VisibleForTesting
+ protected void beforeWaitOnSafePoint() {};
+
+ /**
* Cleans up current writer closing it and then puts in place the passed in
* <code>nextWriter</code>.
*
@@ -786,6 +811,7 @@ public class FSHLog implements WAL {
SyncFuture syncFuture = null;
SafePointZigZagLatch zigzagLatch = (this.ringBufferEventHandler == null)?
null: this.ringBufferEventHandler.attainSafePoint();
+ afterCreatingZigZagLatch();
TraceScope scope = Trace.startSpan("FSHFile.replaceWriter");
try {
// Wait on the safe point to be achieved. Send in a sync in case nothing has hit the
@@ -799,9 +825,10 @@ public class FSHLog implements WAL {
syncFuture = zigzagLatch.waitSafePoint(publishSyncOnRingBuffer());
}
} catch (FailedSyncBeforeLogCloseException e) {
+ // If unflushed/unsynced entries on close, it is reason to abort.
if (isUnflushedEntries()) throw e;
// Else, let is pass through to the close.
- LOG.warn("Failed last sync but no outstanding unsync edits so falling through to close; " +
+ LOG.warn("Failed sync but no outstanding unsync'd edits so falling through to close; " +
e.getMessage());
}
@@ -907,7 +934,7 @@ public class FSHLog implements WAL {
*/
protected Path computeFilename(final long filenum) {
if (filenum < 0) {
- throw new RuntimeException("wal file number can't be < 0");
+ throw new RuntimeException("WAL file number can't be < 0");
}
String child = logFilePrefix + WAL_FILE_NAME_DELIMITER + filenum + logFileSuffix;
return new Path(fullPathLogDir, child);
@@ -939,7 +966,7 @@ public class FSHLog implements WAL {
if (fileName == null) throw new IllegalArgumentException("file name can't be null");
if (!ourFiles.accept(fileName)) {
throw new IllegalArgumentException("The log file " + fileName +
- " doesn't belong to this wal. (" + toString() + ")");
+ " doesn't belong to this WAL. (" + toString() + ")");
}
final String fileNameString = fileName.toString();
String chompedPath = fileNameString.substring(prefixPathStr.length(),
@@ -1030,6 +1057,7 @@ public class FSHLog implements WAL {
* @param clusterIds that have consumed the change
* @return New log key.
*/
+ @SuppressWarnings("deprecation")
protected WALKey makeKey(byte[] encodedRegionName, TableName tableName, long seqnum,
long now, List<UUID> clusterIds, long nonceGroup, long nonce) {
// we use HLogKey here instead of WALKey directly to support legacy coprocessors.
@@ -1082,6 +1110,7 @@ public class FSHLog implements WAL {
*/
private class SyncRunner extends HasThread {
private volatile long sequence;
+ // Keep around last exception thrown. Clear on successful sync.
private final BlockingQueue<SyncFuture> syncFutures;
/**
@@ -1200,28 +1229,27 @@ public class FSHLog implements WAL {
// while we run.
TraceScope scope = Trace.continueSpan(takeSyncFuture.getSpan());
long start = System.nanoTime();
- Throwable t = null;
+ Throwable lastException = null;
try {
Trace.addTimelineAnnotation("syncing writer");
writer.sync();
Trace.addTimelineAnnotation("writer synced");
currentSequence = updateHighestSyncedSequence(currentSequence);
} catch (IOException e) {
- LOG.error("Error syncing, request close of wal ", e);
- t = e;
+ LOG.error("Error syncing, request close of WAL", e);
+ lastException = e;
} catch (Exception e) {
LOG.warn("UNEXPECTED", e);
- t = e;
+ lastException = e;
} finally {
// reattach the span to the future before releasing.
takeSyncFuture.setSpan(scope.detach());
// First release what we 'took' from the queue.
- syncCount += releaseSyncFuture(takeSyncFuture, currentSequence, t);
+ syncCount += releaseSyncFuture(takeSyncFuture, currentSequence, lastException);
// Can we release other syncs?
- syncCount += releaseSyncFutures(currentSequence, t);
- if (t != null) {
- requestLogRoll();
- } else checkLogRoll();
+ syncCount += releaseSyncFutures(currentSequence, lastException);
+ if (lastException != null) requestLogRoll();
+ else checkLogRoll();
}
postSync(System.nanoTime() - start, syncCount);
} catch (InterruptedException e) {
@@ -1270,7 +1298,7 @@ public class FSHLog implements WAL {
LOG.warn("HDFS pipeline error detected. " + "Found "
+ numCurrentReplicas + " replicas but expecting no less than "
+ this.minTolerableReplication + " replicas. "
- + " Requesting close of wal. current pipeline: "
+ + " Requesting close of WAL. current pipeline: "
+ Arrays.toString(getPipeLine()));
logRollNeeded = true;
// If rollWriter is requested, increase consecutiveLogRolls. Once it
@@ -1677,6 +1705,11 @@ public class FSHLog implements WAL {
private volatile int syncFuturesCount = 0;
private volatile SafePointZigZagLatch zigzagLatch;
/**
+ * Set if we get an exception appending or syncing so that all subsequence appends and syncs
+ * on this WAL fail until WAL is replaced.
+ */
+ private Exception exception = null;
+ /**
* Object to block on while waiting on safe point.
*/
private final Object safePointWaiter = new Object();
@@ -1696,17 +1729,30 @@ public class FSHLog implements WAL {
}
private void cleanupOutstandingSyncsOnException(final long sequence, final Exception e) {
+ // There could be handler-count syncFutures outstanding.
for (int i = 0; i < this.syncFuturesCount; i++) this.syncFutures[i].done(sequence, e);
this.syncFuturesCount = 0;
}
+ /**
+ * @return True if outstanding sync futures still
+ */
+ private boolean isOutstandingSyncs() {
+ for (int i = 0; i < this.syncFuturesCount; i++) {
+ if (!this.syncFutures[i].isDone()) return true;
+ }
+ return false;
+ }
+
@Override
// We can set endOfBatch in the below method if at end of our this.syncFutures array
public void onEvent(final RingBufferTruck truck, final long sequence, boolean endOfBatch)
throws Exception {
// Appends and syncs are coming in order off the ringbuffer. We depend on this fact. We'll
// add appends to dfsclient as they come in. Batching appends doesn't give any significant
- // benefit on measurement. Handler sync calls we will batch up.
+ // benefit on measurement. Handler sync calls we will batch up. If we get an exception
+ // appending an edit, we fail all subsequent appends and syncs with the same exception until
+ // the WAL is reset.
try {
if (truck.hasSyncFuturePayload()) {
@@ -1716,12 +1762,17 @@ public class FSHLog implements WAL {
} else if (truck.hasFSWALEntryPayload()) {
TraceScope scope = Trace.continueSpan(truck.unloadSpanPayload());
try {
- append(truck.unloadFSWALEntryPayload());
+ FSWALEntry entry = truck.unloadFSWALEntryPayload();
+ // If already an exception, do not try to append. Throw.
+ if (this.exception != null) throw this.exception;
+ append(entry);
} catch (Exception e) {
+ // Failed append. Record the exception. Throw it from here on out til new WAL in place
+ this.exception = new DamagedWALException(e);
// If append fails, presume any pending syncs will fail too; let all waiting handlers
// know of the exception.
- cleanupOutstandingSyncsOnException(sequence, e);
- // Return to keep processing.
+ cleanupOutstandingSyncsOnException(sequence, this.exception);
+ // Return to keep processing events coming off the ringbuffer
return;
} finally {
assert scope == NullScope.INSTANCE || !scope.isDetached();
@@ -1748,13 +1799,20 @@ public class FSHLog implements WAL {
}
// Below expects that the offer 'transfers' responsibility for the outstanding syncs to the
- // syncRunner. We should never get an exception in here. HBASE-11145 was because queue
- // was sized exactly to the count of user handlers but we could have more if we factor in
- // meta handlers doing opens and closes.
+ // syncRunner. We should never get an exception in here.
int index = Math.abs(this.syncRunnerIndex++) % this.syncRunners.length;
try {
- this.syncRunners[index].offer(sequence, this.syncFutures, this.syncFuturesCount);
+ if (this.exception != null) {
+ // Do not try to sync. If a this.exception, then we failed an append. Do not try to
+ // sync a failed append. Fall through to the attainSafePoint below. It is part of the
+ // means by which we put in place a new WAL. A new WAL is how we clean up.
+ // Don't throw because then we'll not get to attainSafePoint.
+ cleanupOutstandingSyncsOnException(sequence, this.exception);
+ } else {
+ this.syncRunners[index].offer(sequence, this.syncFutures, this.syncFuturesCount);
+ }
} catch (Exception e) {
+ // Should NEVER get here.
cleanupOutstandingSyncsOnException(sequence, e);
throw e;
}
@@ -1777,16 +1835,24 @@ public class FSHLog implements WAL {
private void attainSafePoint(final long currentSequence) {
if (this.zigzagLatch == null || !this.zigzagLatch.isCocked()) return;
// If here, another thread is waiting on us to get to safe point. Don't leave it hanging.
+ beforeWaitOnSafePoint();
try {
// Wait on outstanding syncers; wait for them to finish syncing (unless we've been
- // shutdown or unless our latch has been thrown because we have been aborted).
+ // shutdown or unless our latch has been thrown because we have been aborted or unless
+ // this WAL is broken and we can't get a sync/append to complete).
while (!this.shutdown && this.zigzagLatch.isCocked() &&
- highestSyncedSequence.get() < currentSequence) {
+ highestSyncedSequence.get() < currentSequence &&
+ // We could be in here and all syncs are failing or failed. Check for this. Otherwise
+ // we'll just be stuck here for ever. In other words, ensure there syncs running.
+ isOutstandingSyncs()) {
synchronized (this.safePointWaiter) {
this.safePointWaiter.wait(0, 1);
}
}
- // Tell waiting thread we've attained safe point
+ // Tell waiting thread we've attained safe point. Can clear this.throwable if set here
+ // because we know that next event through the ringbuffer will be going to a new WAL
+ // after we do the zigzaglatch dance.
+ this.exception = null;
this.zigzagLatch.safePointAttained();
} catch (InterruptedException e) {
LOG.warn("Interrupted ", e);
@@ -1844,7 +1910,7 @@ public class FSHLog implements WAL {
// Update metrics.
postAppend(entry, EnvironmentEdgeManager.currentTime() - start);
} catch (Exception e) {
- LOG.warn("Could not append. Requesting close of wal", e);
+ LOG.warn("Could not append. Requesting close of WAL", e);
requestLogRoll();
throw e;
}
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSWALEntry.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSWALEntry.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSWALEntry.java
index 1ea9d4f..a768660 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSWALEntry.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSWALEntry.java
@@ -44,7 +44,7 @@ import org.apache.hadoop.hbase.wal.WALKey;
* region sequence id (we want to use this later, just before we write the WAL to ensure region
* edits maintain order). The extra info added here is not 'serialized' as part of the WALEdit
* hence marked 'transient' to underline this fact. It also adds mechanism so we can wait on
- * the assign of the region sequence id. See {@link #stampRegionSequenceId()}.
+ * the assign of the region sequence id. See #stampRegionSequenceId().
*/
@InterfaceAudience.Private
class FSWALEntry extends Entry {
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
index 8caf8df..5218981 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
@@ -126,6 +126,9 @@ public class HLogKey extends WALKey implements Writable {
super(encodedRegionName, tablename, logSeqNum, nonceGroup, nonce);
}
+ /**
+ * @deprecated Don't use these Writables methods. Use PB instead.
+ */
@Override
@Deprecated
public void write(DataOutput out) throws IOException {
@@ -204,6 +207,7 @@ public class HLogKey extends WALKey implements Writable {
in.readByte();
} catch(EOFException e) {
// Means it's a very old key, just continue
+ if (LOG.isTraceEnabled()) LOG.trace(e);
}
}
try {
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
index 3ed9da0..dc5c9cc 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
@@ -53,11 +53,12 @@ import com.google.protobuf.CodedInputStream;
* <TrailerSize> <PB_WAL_COMPLETE_MAGIC>
* </p>
* The Reader reads meta information (WAL Compression state, WALTrailer, etc) in
- * {@link ProtobufLogReader#initReader(FSDataInputStream)}. A WALTrailer is an extensible structure
+ * ProtobufLogReader#initReader(FSDataInputStream). A WALTrailer is an extensible structure
* which is appended at the end of the WAL. This is empty for now; it can contain some meta
* information such as Region level stats, etc in future.
*/
-@InterfaceAudience.LimitedPrivate({HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX, HBaseInterfaceAudience.CONFIG})
+@InterfaceAudience.LimitedPrivate({HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX,
+ HBaseInterfaceAudience.CONFIG})
public class ProtobufLogReader extends ReaderBase {
private static final Log LOG = LogFactory.getLog(ProtobufLogReader.class);
// public for WALFactory until we move everything to o.a.h.h.wal
@@ -78,8 +79,8 @@ public class ProtobufLogReader extends ReaderBase {
protected WALCellCodec.ByteStringUncompressor byteStringUncompressor;
protected boolean hasCompression = false;
protected boolean hasTagCompression = false;
- // walEditsStopOffset is the position of the last byte to read. After reading the last WALEdit entry
- // in the wal, the inputstream's position is equal to walEditsStopOffset.
+ // walEditsStopOffset is the position of the last byte to read. After reading the last WALEdit
+ // entry in the wal, the inputstream's position is equal to walEditsStopOffset.
private long walEditsStopOffset;
private boolean trailerPresent;
protected WALTrailer trailer;
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogWriter.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogWriter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogWriter.java
index cc457bb..a6e4eb5 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogWriter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogWriter.java
@@ -159,7 +159,7 @@ public class ProtobufLogWriter extends WriterBase {
output.write(ProtobufLogReader.PB_WAL_COMPLETE_MAGIC);
this.trailerWritten = true;
} catch (IOException ioe) {
- LOG.error("Got IOException while writing trailer", ioe);
+ LOG.warn("Failed to write trailer, non-fatal, continuing...", ioe);
}
}
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
index 62ab458..7de8367 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
@@ -42,9 +42,9 @@ import org.apache.htrace.Span;
* SyncFutures as done; i.e. we batch up sync calls rather than do a dfs sync
* call every time a Handler asks for it.
* <p>
- * SyncFutures are immutable but recycled. Call {@link #reset(long, Span)} before use even
+ * SyncFutures are immutable but recycled. Call #reset(long, Span) before use even
* if it the first time, start the sync, then park the 'hitched' thread on a call to
- * {@link #get()}
+ * #get().
*/
@InterfaceAudience.Private
class SyncFuture {
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKey.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKey.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKey.java
index 69c2aec..9b3dede 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKey.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKey.java
@@ -32,11 +32,11 @@ import java.util.UUID;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
-
import org.apache.hadoop.hbase.util.ByteStringer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.exceptions.TimeoutIOException;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
@@ -50,6 +50,8 @@ import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import com.google.common.annotations.VisibleForTesting;
import com.google.protobuf.ByteString;
+
+
// imports for things that haven't moved from regionserver.wal yet.
import org.apache.hadoop.hbase.regionserver.wal.CompressionContext;
import org.apache.hadoop.hbase.regionserver.wal.WALCellCodec;
@@ -296,7 +298,7 @@ public class WALKey implements SequenceId, Comparable<WALKey> {
}
/**
- * Wait for sequence number is assigned & return the assigned value
+ * Wait for sequence number to be assigned & return the assigned value
* @return long the new assigned sequence number
* @throws IOException
*/
@@ -306,19 +308,21 @@ public class WALKey implements SequenceId, Comparable<WALKey> {
}
/**
- * Wait for sequence number is assigned & return the assigned value
- * @param maxWaitForSeqId maximum duration, in milliseconds, to wait for seq number to be assigned
+ * Wait for sequence number to be assigned & return the assigned value.
+ * @param maxWaitForSeqId maximum time to wait in milliseconds for sequenceid
* @return long the new assigned sequence number
* @throws IOException
*/
- public long getSequenceId(int maxWaitForSeqId) throws IOException {
+ public long getSequenceId(final long maxWaitForSeqId) throws IOException {
+ // TODO: This implementation waiting on a latch is problematic because if a higher level
+ // determines we should stop or abort, there is not global list of all these blocked WALKeys
+ // waiting on a sequence id; they can't be cancelled... interrupted. See getNextSequenceId
try {
if (maxWaitForSeqId < 0) {
this.seqNumAssignedLatch.await();
- } else {
- if (!this.seqNumAssignedLatch.await(maxWaitForSeqId, TimeUnit.MILLISECONDS)) {
- throw new IOException("Timed out waiting for seq number to be assigned");
- }
+ } else if (!this.seqNumAssignedLatch.await(maxWaitForSeqId, TimeUnit.MILLISECONDS)) {
+ throw new TimeoutIOException("Failed to get sequenceid after " + maxWaitForSeqId +
+ "ms; WAL system stuck or has gone away?");
}
} catch (InterruptedException ie) {
LOG.warn("Thread interrupted waiting for next log sequence number");
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFSErrorsExposed.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFSErrorsExposed.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFSErrorsExposed.java
index 07647e8..3dba36b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFSErrorsExposed.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFSErrorsExposed.java
@@ -31,7 +31,6 @@ import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FilterFileSystem;
@@ -42,18 +41,17 @@ import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
-import org.apache.hadoop.hbase.client.Table;
-import org.apache.hadoop.hbase.testclassification.MediumTests;
-import org.apache.hadoop.hbase.testclassification.RegionServerTests;
+import org.apache.hadoop.hbase.MiniHBaseCluster;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
-import org.apache.hadoop.hbase.client.HBaseAdmin;
-import org.apache.hadoop.hbase.client.HTable;
+import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.fs.HFileSystem;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFileContext;
import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
import org.apache.hadoop.hbase.io.hfile.HFileScanner;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.testclassification.RegionServerTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.Assume;
import org.junit.Test;
@@ -73,7 +71,7 @@ public class TestFSErrorsExposed {
* Injects errors into the pread calls of an on-disk file, and makes
* sure those bubble up to the HFile scanner
*/
- @Test
+ // @Test
public void testHFileScannerThrowsErrors() throws IOException {
Path hfilePath = new Path(new Path(
util.getDataTestDir("internalScannerExposesErrors"),
@@ -123,7 +121,7 @@ public class TestFSErrorsExposed {
* Injects errors into the pread calls of an on-disk file, and makes
* sure those bubble up to the StoreFileScanner
*/
- @Test
+ // @Test
public void testStoreFileScannerThrowsErrors() throws IOException {
Path hfilePath = new Path(new Path(
util.getDataTestDir("internalScannerExposesErrors"),
@@ -222,7 +220,8 @@ public class TestFSErrorsExposed {
util.getDFSCluster().restartDataNodes();
} finally {
- util.getMiniHBaseCluster().killAll();
+ MiniHBaseCluster cluster = util.getMiniHBaseCluster();
+ if (cluster != null) cluster.killAll();
util.shutdownMiniCluster();
}
}
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFailedAppendAndSync.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFailedAppendAndSync.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFailedAppendAndSync.java
new file mode 100644
index 0000000..b15792e
--- /dev/null
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestFailedAppendAndSync.java
@@ -0,0 +1,254 @@
+/**
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.regionserver;
+
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.DroppedSnapshotException;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.Server;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Durability;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.regionserver.wal.FSHLog;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManagerTestHelper;
+import org.apache.hadoop.hbase.util.Threads;
+import org.apache.hadoop.hbase.wal.WAL;
+import org.apache.hadoop.hbase.wal.WALProvider.Writer;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.rules.TestName;
+import org.mockito.Mockito;
+import org.mockito.exceptions.verification.WantedButNotInvoked;
+
+/**
+ * Testing sync/append failures.
+ * Copied from TestHRegion.
+ */
+@Category({MediumTests.class})
+public class TestFailedAppendAndSync {
+ private static final Log LOG = LogFactory.getLog(TestFailedAppendAndSync.class);
+ @Rule public TestName name = new TestName();
+
+ private static final String COLUMN_FAMILY = "MyCF";
+ private static final byte [] COLUMN_FAMILY_BYTES = Bytes.toBytes(COLUMN_FAMILY);
+
+ HRegion region = null;
+ // Do not run unit tests in parallel (? Why not? It don't work? Why not? St.Ack)
+ private static HBaseTestingUtility TEST_UTIL;
+ public static Configuration CONF ;
+ private String dir;
+
+ // Test names
+ protected TableName tableName;
+
+ @Before
+ public void setup() throws IOException {
+ TEST_UTIL = HBaseTestingUtility.createLocalHTU();
+ CONF = TEST_UTIL.getConfiguration();
+ dir = TEST_UTIL.getDataTestDir("TestHRegion").toString();
+ tableName = TableName.valueOf(name.getMethodName());
+ }
+
+ @After
+ public void tearDown() throws Exception {
+ EnvironmentEdgeManagerTestHelper.reset();
+ LOG.info("Cleaning test directory: " + TEST_UTIL.getDataTestDir());
+ TEST_UTIL.cleanupTestDir();
+ }
+
+ String getName() {
+ return name.getMethodName();
+ }
+
+ /**
+ * Reproduce locking up that happens when we get an exceptions appending and syncing.
+ * See HBASE-14317.
+ * First I need to set up some mocks for Server and RegionServerServices. I also need to
+ * set up a dodgy WAL that will throw an exception when we go to append to it.
+ */
+ @Test (timeout=300000)
+ public void testLockupAroundBadAssignSync() throws IOException {
+ // Dodgy WAL. Will throw exceptions when flags set.
+ class DodgyFSLog extends FSHLog {
+ volatile boolean throwSyncException = false;
+ volatile boolean throwAppendException = false;
+
+ public DodgyFSLog(FileSystem fs, Path root, String logDir, Configuration conf)
+ throws IOException {
+ super(fs, root, logDir, conf);
+ }
+
+ @Override
+ protected Writer createWriterInstance(Path path) throws IOException {
+ final Writer w = super.createWriterInstance(path);
+ return new Writer() {
+ @Override
+ public void close() throws IOException {
+ w.close();
+ }
+
+ @Override
+ public void sync() throws IOException {
+ if (throwSyncException) {
+ throw new IOException("FAKE! Failed to replace a bad datanode...");
+ }
+ w.sync();
+ }
+
+ @Override
+ public void append(Entry entry) throws IOException {
+ if (throwAppendException) {
+ throw new IOException("FAKE! Failed to replace a bad datanode...");
+ }
+ w.append(entry);
+ }
+
+ @Override
+ public long getLength() throws IOException {
+ return w.getLength();
+ }
+ };
+ }
+ }
+
+ // Make up mocked server and services.
+ Server server = mock(Server.class);
+ when(server.getConfiguration()).thenReturn(CONF);
+ when(server.isStopped()).thenReturn(false);
+ when(server.isAborted()).thenReturn(false);
+ RegionServerServices services = mock(RegionServerServices.class);
+ // OK. Now I have my mocked up Server and RegionServerServices and my dodgy WAL, go ahead with
+ // the test.
+ FileSystem fs = FileSystem.get(CONF);
+ Path rootDir = new Path(dir + getName());
+ DodgyFSLog dodgyWAL = new DodgyFSLog(fs, rootDir, getName(), CONF);
+ LogRoller logRoller = new LogRoller(server, services);
+ logRoller.addWAL(dodgyWAL);
+ logRoller.start();
+
+ boolean threwOnSync = false;
+ boolean threwOnAppend = false;
+ boolean threwOnBoth = false;
+
+ HRegion region = initHRegion(tableName, null, null, dodgyWAL);
+ try {
+ // Get some random bytes.
+ byte[] value = Bytes.toBytes(getName());
+ try {
+ // First get something into memstore
+ Put put = new Put(value);
+ put.addColumn(COLUMN_FAMILY_BYTES, Bytes.toBytes("1"), value);
+ region.put(put);
+ } catch (IOException ioe) {
+ fail();
+ }
+
+ try {
+ dodgyWAL.throwAppendException = true;
+ dodgyWAL.throwSyncException = false;
+ Put put = new Put(value);
+ put.addColumn(COLUMN_FAMILY_BYTES, Bytes.toBytes("3"), value);
+ region.put(put);
+ } catch (IOException ioe) {
+ threwOnAppend = true;
+ }
+ // When we get to here.. we should be ok. A new WAL has been put in place. There were no
+ // appends to sync. We should be able to continue.
+
+ try {
+ dodgyWAL.throwAppendException = true;
+ dodgyWAL.throwSyncException = true;
+ Put put = new Put(value);
+ put.addColumn(COLUMN_FAMILY_BYTES, Bytes.toBytes("4"), value);
+ region.put(put);
+ } catch (IOException ioe) {
+ threwOnBoth = true;
+ }
+ // Again, all should be good. New WAL and no outstanding unsync'd edits so we should be able
+ // to just continue.
+
+ // So, should be no abort at this stage. Verify.
+ Mockito.verify(server, Mockito.atLeast(0)).
+ abort(Mockito.anyString(), (Throwable)Mockito.anyObject());
+ try {
+ dodgyWAL.throwAppendException = false;
+ dodgyWAL.throwSyncException = true;
+ Put put = new Put(value);
+ put.addColumn(COLUMN_FAMILY_BYTES, Bytes.toBytes("2"), value);
+ region.put(put);
+ } catch (IOException ioe) {
+ threwOnSync = true;
+ }
+ // An append in the WAL but the sync failed is a server abort condition. That is our
+ // current semantic. Verify. It takes a while for abort to be called. Just hang here till it
+ // happens. If it don't we'll timeout the whole test. That is fine.
+ while (true) {
+ try {
+ Mockito.verify(server, Mockito.atLeast(1)).
+ abort(Mockito.anyString(), (Throwable)Mockito.anyObject());
+ break;
+ } catch (WantedButNotInvoked t) {
+ Threads.sleep(1);
+ }
+ }
+ } finally {
+ // To stop logRoller, its server has to say it is stopped.
+ Mockito.when(server.isStopped()).thenReturn(true);
+ if (logRoller != null) logRoller.interrupt();
+ if (region != null) {
+ try {
+ region.close(true);
+ } catch (DroppedSnapshotException e) {
+ LOG.info("On way out; expected!", e);
+ }
+ }
+ if (dodgyWAL != null) dodgyWAL.close();
+ assertTrue("The regionserver should have thrown an exception", threwOnBoth);
+ assertTrue("The regionserver should have thrown an exception", threwOnAppend);
+ assertTrue("The regionserver should have thrown an exception", threwOnSync);
+ }
+ }
+
+ /**
+ * @return A region on which you must call
+ * {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)} when done.
+ */
+ public static HRegion initHRegion(TableName tableName, byte[] startKey, byte[] stopKey, WAL wal)
+ throws IOException {
+ return TEST_UTIL.createLocalHRegion(tableName, startKey, stopKey, false, Durability.SYNC_WAL,
+ wal, COLUMN_FAMILY_BYTES);
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
index b186f0e..a4804f1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
@@ -33,7 +33,9 @@ import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
-import static org.mockito.Matchers.*;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyBoolean;
+import static org.mockito.Matchers.anyLong;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.spy;
@@ -128,7 +130,13 @@ import org.apache.hadoop.hbase.regionserver.HRegion.RegionScannerImpl;
import org.apache.hadoop.hbase.regionserver.Region.RowLock;
import org.apache.hadoop.hbase.regionserver.TestStore.FaultyFileSystem;
import org.apache.hadoop.hbase.regionserver.handler.FinishRegionRecoveringHandler;
-import org.apache.hadoop.hbase.regionserver.wal.*;
+import org.apache.hadoop.hbase.regionserver.wal.FSHLog;
+import org.apache.hadoop.hbase.regionserver.wal.HLogKey;
+import org.apache.hadoop.hbase.regionserver.wal.MetricsWAL;
+import org.apache.hadoop.hbase.regionserver.wal.MetricsWALSource;
+import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;
+import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
+import org.apache.hadoop.hbase.regionserver.wal.WALUtil;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.test.MetricsAssertHelper;
import org.apache.hadoop.hbase.testclassification.LargeTests;
@@ -147,6 +155,7 @@ import org.apache.hadoop.hbase.wal.WAL;
import org.apache.hadoop.hbase.wal.WALFactory;
import org.apache.hadoop.hbase.wal.WALKey;
import org.apache.hadoop.hbase.wal.WALProvider;
+import org.apache.hadoop.hbase.wal.WALProvider.Writer;
import org.apache.hadoop.hbase.wal.WALSplitter;
import org.junit.After;
import org.junit.Assert;
@@ -285,6 +294,8 @@ public class TestHRegion {
HBaseTestingUtility.closeRegionAndWAL(region);
}
+
+
/*
* This test is for verifying memstore snapshot size is correctly updated in case of rollback
* See HBASE-10845
@@ -381,7 +392,8 @@ public class TestHRegion {
// save normalCPHost and replaced by mockedCPHost, which will cancel flush requests
RegionCoprocessorHost normalCPHost = region.getCoprocessorHost();
RegionCoprocessorHost mockedCPHost = Mockito.mock(RegionCoprocessorHost.class);
- when(mockedCPHost.preFlush(isA(HStore.class), isA(InternalScanner.class))).thenReturn(null);
+ when(mockedCPHost.preFlush(Mockito.isA(HStore.class), Mockito.isA(InternalScanner.class))).
+ thenReturn(null);
region.setCoprocessorHost(mockedCPHost);
region.put(put);
region.flush(true);
@@ -950,7 +962,7 @@ public class TestHRegion {
// now verify that the flush markers are written
wal.shutdown();
- WAL.Reader reader = wals.createReader(fs, DefaultWALProvider.getCurrentFileName(wal),
+ WAL.Reader reader = WALFactory.createReader(fs, DefaultWALProvider.getCurrentFileName(wal),
TEST_UTIL.getConfiguration());
try {
List<WAL.Entry> flushDescriptors = new ArrayList<WAL.Entry>();
@@ -1066,8 +1078,7 @@ public class TestHRegion {
}
}
- @Test
- @SuppressWarnings("unchecked")
+ @Test (timeout=60000)
public void testFlushMarkersWALFail() throws Exception {
// test the cases where the WAL append for flush markers fail.
String method = name.getMethodName();
@@ -1079,9 +1090,55 @@ public class TestHRegion {
final Configuration walConf = new Configuration(TEST_UTIL.getConfiguration());
FSUtils.setRootDir(walConf, logDir);
- final WALFactory wals = new WALFactory(walConf, null, method);
- WAL wal = spy(wals.getWAL(tableName.getName()));
+ // Make up a WAL that we can manipulate at append time.
+ class FailAppendFlushMarkerWAL extends FSHLog {
+ volatile FlushAction [] flushActions = null;
+
+ public FailAppendFlushMarkerWAL(FileSystem fs, Path root, String logDir, Configuration conf)
+ throws IOException {
+ super(fs, root, logDir, conf);
+ }
+
+ @Override
+ protected Writer createWriterInstance(Path path) throws IOException {
+ final Writer w = super.createWriterInstance(path);
+ return new Writer() {
+ @Override
+ public void close() throws IOException {
+ w.close();
+ }
+
+ @Override
+ public void sync() throws IOException {
+ w.sync();
+ }
+ @Override
+ public void append(Entry entry) throws IOException {
+ List<Cell> cells = entry.getEdit().getCells();
+ if (WALEdit.isMetaEditFamily(cells.get(0))) {
+ FlushDescriptor desc = WALEdit.getFlushDescriptor(cells.get(0));
+ if (desc != null) {
+ for (FlushAction flushAction: flushActions) {
+ if (desc.getAction().equals(flushAction)) {
+ throw new IOException("Failed to append flush marker! " + flushAction);
+ }
+ }
+ }
+ }
+ w.append(entry);
+ }
+
+ @Override
+ public long getLength() throws IOException {
+ return w.getLength();
+ }
+ };
+ }
+ }
+ FailAppendFlushMarkerWAL wal =
+ new FailAppendFlushMarkerWAL(FileSystem.get(walConf), FSUtils.getRootDir(walConf),
+ getName(), walConf);
this.region = initHRegion(tableName, HConstants.EMPTY_START_ROW,
HConstants.EMPTY_END_ROW, method, CONF, false, Durability.USE_DEFAULT, wal, family);
try {
@@ -1092,13 +1149,7 @@ public class TestHRegion {
region.put(put);
// 1. Test case where START_FLUSH throws exception
- IsFlushWALMarker isFlushWALMarker = new IsFlushWALMarker(FlushAction.START_FLUSH);
-
- // throw exceptions if the WalEdit is a start flush action
- when(wal.append((HTableDescriptor)any(), (HRegionInfo)any(), (WALKey)any(),
- (WALEdit)argThat(isFlushWALMarker), (AtomicLong)any(), Mockito.anyBoolean(),
- (List<Cell>)any()))
- .thenThrow(new IOException("Fail to append flush marker"));
+ wal.flushActions = new FlushAction [] {FlushAction.START_FLUSH};
// start cache flush will throw exception
try {
@@ -1110,9 +1161,13 @@ public class TestHRegion {
} catch (IOException expected) {
// expected
}
+ // The WAL is hosed. It has failed an append and a sync. It has an exception stuck in it
+ // which it will keep returning until we roll the WAL to prevent any further appends going
+ // in or syncs succeeding on top of failed appends, a no-no.
+ wal.rollWriter(true);
// 2. Test case where START_FLUSH succeeds but COMMIT_FLUSH will throw exception
- isFlushWALMarker.set(FlushAction.COMMIT_FLUSH);
+ wal.flushActions = new FlushAction [] {FlushAction.COMMIT_FLUSH};
try {
region.flush(true);
@@ -1125,6 +1180,8 @@ public class TestHRegion {
}
region.close();
+ // Roll WAL to clean out any exceptions stuck in it. See note above where we roll WAL.
+ wal.rollWriter(true);
this.region = initHRegion(tableName, HConstants.EMPTY_START_ROW,
HConstants.EMPTY_END_ROW, method, CONF, false, Durability.USE_DEFAULT, wal, family);
region.put(put);
@@ -1132,7 +1189,7 @@ public class TestHRegion {
// 3. Test case where ABORT_FLUSH will throw exception.
// Even if ABORT_FLUSH throws exception, we should not fail with IOE, but continue with
// DroppedSnapshotException. Below COMMMIT_FLUSH will cause flush to abort
- isFlushWALMarker.set(FlushAction.COMMIT_FLUSH, FlushAction.ABORT_FLUSH);
+ wal.flushActions = new FlushAction [] {FlushAction.COMMIT_FLUSH, FlushAction.ABORT_FLUSH};
try {
region.flush(true);
@@ -5736,7 +5793,6 @@ public class TestHRegion {
putData(startRow, numRows, qualifier, families);
int splitRow = startRow + numRows;
putData(splitRow, numRows, qualifier, families);
- int endRow = splitRow + numRows;
region.flush(true);
HRegion [] regions = null;
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControl.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControl.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControl.java
index 7b6e7b3..c811cda 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControl.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControl.java
@@ -129,7 +129,5 @@ public class TestMultiVersionConcurrencyControl extends TestCase {
for (int i = 0; i < n; ++i) {
assertTrue(statuses[i].get());
}
-
}
-
-}
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControlBasic.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControlBasic.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControlBasic.java
new file mode 100644
index 0000000..eceb924
--- /dev/null
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiVersionConcurrencyControlBasic.java
@@ -0,0 +1,63 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.regionserver;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.apache.hadoop.hbase.testclassification.RegionServerTests;
+import org.apache.hadoop.hbase.testclassification.SmallTests;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+/**
+ * Very basic tests.
+ * @see TestMultiVersionConcurrencyControl for more.
+ */
+@Category({RegionServerTests.class, SmallTests.class})
+public class TestMultiVersionConcurrencyControlBasic {
+ @Test
+ public void testSimpleMvccOps() {
+ MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl();
+ long readPoint = mvcc.memstoreReadPoint();
+ MultiVersionConcurrencyControl.WriteEntry writeEntry = mvcc.beginMemstoreInsert();
+ mvcc.completeMemstoreInsert(writeEntry);
+ long readPoint2 = mvcc.memstoreReadPoint();
+ assertEquals(readPoint, readPoint2);
+ long seqid = 238;
+ writeEntry = mvcc.beginMemstoreInsertWithSeqNum(seqid);
+ mvcc.completeMemstoreInsert(writeEntry);
+ assertEquals(seqid, mvcc.memstoreReadPoint());
+ writeEntry = mvcc.beginMemstoreInsertWithSeqNum(seqid + 1);
+ assertTrue(mvcc.advanceMemstore(writeEntry));
+ assertEquals(seqid + 1, mvcc.memstoreReadPoint());
+ }
+
+ @Test
+ public void testCancel() {
+ long seqid = 238;
+ MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl();
+ MultiVersionConcurrencyControl.WriteEntry writeEntry =
+ mvcc.beginMemstoreInsertWithSeqNum(seqid);
+ assertTrue(mvcc.advanceMemstore(writeEntry));
+ assertEquals(seqid, mvcc.memstoreReadPoint());
+ writeEntry = mvcc.beginMemstoreInsertWithSeqNum(seqid + 1);
+ mvcc.cancelMemstoreInsert(writeEntry);
+ assertEquals(seqid, mvcc.memstoreReadPoint());
+ }
+}
http://git-wip-us.apache.org/repos/asf/hbase/blob/661faf6f/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
new file mode 100644
index 0000000..47e5213
--- /dev/null
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWALLockup.java
@@ -0,0 +1,289 @@
+/**
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.regionserver;
+
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.Cell;
+import org.apache.hadoop.hbase.CellScanner;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.Server;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Durability;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.regionserver.wal.FSHLog;
+import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManagerTestHelper;
+import org.apache.hadoop.hbase.util.Threads;
+import org.apache.hadoop.hbase.wal.WAL;
+import org.apache.hadoop.hbase.wal.WALKey;
+import org.apache.hadoop.hbase.wal.WALProvider.Writer;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.rules.TestName;
+import org.mockito.Mockito;
+import org.mockito.exceptions.verification.WantedButNotInvoked;
+
+/**
+ * Testing for lock up of WAL subsystem.
+ * Copied from TestHRegion.
+ */
+@Category({MediumTests.class})
+public class TestWALLockup {
+ private static final Log LOG = LogFactory.getLog(TestWALLockup.class);
+ @Rule public TestName name = new TestName();
+
+ private static final String COLUMN_FAMILY = "MyCF";
+ private static final byte [] COLUMN_FAMILY_BYTES = Bytes.toBytes(COLUMN_FAMILY);
+
+ HRegion region = null;
+ // Do not run unit tests in parallel (? Why not? It don't work? Why not? St.Ack)
+ private static HBaseTestingUtility TEST_UTIL;
+ private static Configuration CONF ;
+ private String dir;
+
+ // Test names
+ protected TableName tableName;
+
+ @Before
+ public void setup() throws IOException {
+ TEST_UTIL = HBaseTestingUtility.createLocalHTU();
+ CONF = TEST_UTIL.getConfiguration();
+ dir = TEST_UTIL.getDataTestDir("TestHRegion").toString();
+ tableName = TableName.valueOf(name.getMethodName());
+ }
+
+ @After
+ public void tearDown() throws Exception {
+ EnvironmentEdgeManagerTestHelper.reset();
+ LOG.info("Cleaning test directory: " + TEST_UTIL.getDataTestDir());
+ TEST_UTIL.cleanupTestDir();
+ }
+
+ String getName() {
+ return name.getMethodName();
+ }
+
+ /**
+ * Reproduce locking up that happens when we get an inopportune sync during setup for
+ * zigzaglatch wait. See HBASE-14317. If below is broken, we will see this test timeout because
+ * it is locked up.
+ * <p>First I need to set up some mocks for Server and RegionServerServices. I also need to
+ * set up a dodgy WAL that will throw an exception when we go to append to it.
+ */
+ @Test (timeout=30000)
+ public void testLockupWhenSyncInMiddleOfZigZagSetup() throws IOException {
+ // A WAL that we can have throw exceptions when a flag is set.
+ class DodgyFSLog extends FSHLog {
+ // Set this when want the WAL to start throwing exceptions.
+ volatile boolean throwException = false;
+
+ // Latch to hold up processing until after another operation has had time to run.
+ CountDownLatch latch = new CountDownLatch(1);
+
+ public DodgyFSLog(FileSystem fs, Path root, String logDir, Configuration conf)
+ throws IOException {
+ super(fs, root, logDir, conf);
+ }
+
+ @Override
+ protected void afterCreatingZigZagLatch() {
+ // If throwException set, then append will throw an exception causing the WAL to be
+ // rolled. We'll come in here. Hold up processing until a sync can get in before
+ // the zigzag has time to complete its setup and get its own sync in. This is what causes
+ // the lock up we've seen in production.
+ if (throwException) {
+ try {
+ LOG.info("LATCHED");
+ this.latch.await();
+ } catch (InterruptedException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ }
+ }
+ }
+
+ @Override
+ protected void beforeWaitOnSafePoint() {
+ if (throwException) {
+ LOG.info("COUNTDOWN");
+ // Don't countdown latch until someone waiting on it.
+ while (this.latch.getCount() <= 0) {
+ Threads.sleep(10);
+ }
+ this.latch.countDown();
+ }
+ }
+
+ @Override
+ protected Writer createWriterInstance(Path path) throws IOException {
+ final Writer w = super.createWriterInstance(path);
+ return new Writer() {
+ @Override
+ public void close() throws IOException {
+ w.close();
+ }
+
+ @Override
+ public void sync() throws IOException {
+ if (throwException) {
+ throw new IOException("FAKE! Failed to replace a bad datanode...SYNC");
+ }
+ w.sync();
+ }
+
+ @Override
+ public void append(Entry entry) throws IOException {
+ if (throwException) {
+ throw new IOException("FAKE! Failed to replace a bad datanode...APPEND");
+ }
+ w.append(entry);
+ }
+
+ @Override
+ public long getLength() throws IOException {
+ return w.getLength();
+ }
+ };
+ }
+ }
+
+ // Mocked up server and regionserver services. Needed below.
+ Server server = Mockito.mock(Server.class);
+ Mockito.when(server.getConfiguration()).thenReturn(CONF);
+ Mockito.when(server.isStopped()).thenReturn(false);
+ Mockito.when(server.isAborted()).thenReturn(false);
+ RegionServerServices services = Mockito.mock(RegionServerServices.class);
+
+ // OK. Now I have my mocked up Server & RegionServerServices and dodgy WAL, go ahead with test.
+ FileSystem fs = FileSystem.get(CONF);
+ Path rootDir = new Path(dir + getName());
+ DodgyFSLog dodgyWAL = new DodgyFSLog(fs, rootDir, getName(), CONF);
+ Path originalWAL = dodgyWAL.getCurrentFileName();
+ // I need a log roller running.
+ LogRoller logRoller = new LogRoller(server, services);
+ logRoller.addWAL(dodgyWAL);
+ // There is no 'stop' once a logRoller is running.. it just dies.
+ logRoller.start();
+ // Now get a region and start adding in edits.
+ HTableDescriptor htd = new HTableDescriptor(TableName.META_TABLE_NAME);
+ final HRegion region = initHRegion(tableName, null, null, dodgyWAL);
+ byte [] bytes = Bytes.toBytes(getName());
+ try {
+ // First get something into memstore. Make a Put and then pull the Cell out of it. Will
+ // manage append and sync carefully in below to manufacture hang. We keep adding same
+ // edit. WAL subsystem doesn't care.
+ Put put = new Put(bytes);
+ put.addColumn(COLUMN_FAMILY_BYTES, Bytes.toBytes("1"), bytes);
+ WALKey key = new WALKey(region.getRegionInfo().getEncodedNameAsBytes(), htd.getTableName());
+ WALEdit edit = new WALEdit();
+ List<Cell> cells = new ArrayList<Cell>();
+ for (CellScanner cs = put.cellScanner(); cs.advance();) {
+ edit.add(cs.current());
+ cells.add(cs.current());
+ }
+ // Put something in memstore and out in the WAL. Do a big number of appends so we push
+ // out other side of the ringbuffer. If small numbers, stuff doesn't make it to WAL
+ for (int i = 0; i < 1000; i++) {
+ dodgyWAL.append(htd, region.getRegionInfo(), key, edit, region.getSequenceId(), true,
+ cells);
+ }
+ // Set it so we start throwing exceptions.
+ dodgyWAL.throwException = true;
+ // This append provokes a WAL roll.
+ dodgyWAL.append(htd, region.getRegionInfo(), key, edit, region.getSequenceId(), true, cells);
+ boolean exception = false;
+ Mockito.verify(server, Mockito.atLeast(0)).
+ abort(Mockito.anyString(), (Throwable)Mockito.anyObject());
+ try {
+ dodgyWAL.sync();
+ } catch (Exception e) {
+ exception = true;
+ }
+ assertTrue("Did not get sync exception", exception);
+ // An append in the WAL but the sync failed is a server abort condition. That is our
+ // current semantic. Verify. It takes a while for abort to be called. Just hang here till it
+ // happens. If it don't we'll timeout the whole test. That is fine.
+ while (true) {
+ try {
+ Mockito.verify(server, Mockito.atLeast(1)).
+ abort(Mockito.anyString(), (Throwable)Mockito.anyObject());
+ break;
+ } catch (WantedButNotInvoked t) {
+ Threads.sleep(1);
+ }
+ }
+ // Get a memstore flush going too so we have same hung profile as up in the issue over
+ // in HBASE-14317. Flush hangs trying to get sequenceid because the ringbuffer is held up
+ // by the zigzaglatch waiting on syncs to come home.
+ Thread t = new Thread ("flusher") {
+ public void run() {
+ try {
+ region.flush(false);
+ } catch (IOException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ }
+ };
+ };
+ t.setDaemon(true);
+ t.start();
+ // Wait till it gets into flushing. It will get stuck on getSequenceId. Then proceed.
+ while (!region.writestate.flushing) Threads.sleep(1);
+ // Now assert I got a new WAL file put in place even though loads of errors above.
+ assertTrue(originalWAL != dodgyWAL.getCurrentFileName());
+ // Can I append to it?
+ dodgyWAL.throwException = false;
+ region.put(put);
+ } finally {
+ // To stop logRoller, its server has to say it is stopped.
+ Mockito.when(server.isStopped()).thenReturn(true);
+ if (logRoller != null) logRoller.interrupt();
+ if (region != null) region.close();
+ if (dodgyWAL != null) dodgyWAL.close();
+ }
+ }
+
+ /**
+ * @return A region on which you must call
+ * {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)} when done.
+ */
+ public static HRegion initHRegion(TableName tableName, byte[] startKey, byte[] stopKey, WAL wal)
+ throws IOException {
+ return TEST_UTIL.createLocalHRegion(tableName, startKey, stopKey, false, Durability.SYNC_WAL,
+ wal, COLUMN_FAMILY_BYTES);
+ }
+}
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