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new 8e8deb09a38 HBASE-29088 The denominator cannot be 0 when calculating
percentages in SnapshotStats (#6617)
8e8deb09a38 is described below
commit 8e8deb09a38c1005dfa8c887c8e61d4ad10d9ce3
Author: Peng Lu <[email protected]>
AuthorDate: Sun Feb 2 23:08:05 2025 +0800
HBASE-29088 The denominator cannot be 0 when calculating percentages in
SnapshotStats (#6617)
Signed-off-by: Pankaj Kumar<[email protected]>
Signed-off-by: Duo Zhang <[email protected]>
---
.../apache/hadoop/hbase/snapshot/SnapshotInfo.java | 8 +-
.../hbase/master/snapshot/TestSnapshotStats.java | 126 +++++++++++++++++++++
2 files changed, 132 insertions(+), 2 deletions(-)
diff --git
a/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotInfo.java
b/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotInfo.java
index 7a7d4424176..151319e165a 100644
---
a/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotInfo.java
+++
b/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotInfo.java
@@ -253,12 +253,16 @@ public final class SnapshotInfo extends AbstractHBaseTool
{
/** Returns the percentage of the shared store files */
public float getSharedStoreFilePercentage() {
- return ((float) hfilesSize.get() / (getStoreFilesSize())) * 100;
+ return getStoreFilesSize() == 0
+ ? 0
+ : ((float) hfilesSize.get() / (getStoreFilesSize())) * 100;
}
/** Returns the percentage of the mob store files */
public float getMobStoreFilePercentage() {
- return ((float) hfilesMobSize.get() / (getStoreFilesSize())) * 100;
+ return getStoreFilesSize() == 0
+ ? 0
+ : ((float) hfilesMobSize.get() / (getStoreFilesSize())) * 100;
}
/** Returns the total log size */
diff --git
a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/snapshot/TestSnapshotStats.java
b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/snapshot/TestSnapshotStats.java
new file mode 100644
index 00000000000..155d24ae20e
--- /dev/null
+++
b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/snapshot/TestSnapshotStats.java
@@ -0,0 +1,126 @@
+/*
+ * 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.master.snapshot;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.Optional;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseTestingUtil;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Admin;
+import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
+import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
+import org.apache.hadoop.hbase.client.SnapshotDescription;
+import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
+import org.apache.hadoop.hbase.snapshot.SnapshotInfo;
+import org.apache.hadoop.hbase.testclassification.LargeTests;
+import org.apache.hadoop.hbase.testclassification.MasterTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.rules.TestName;
+
+@Category({ MasterTests.class, LargeTests.class })
+public class TestSnapshotStats {
+ @ClassRule
+ public static final HBaseClassTestRule CLASS_RULE =
+ HBaseClassTestRule.forClass(TestSnapshotStats.class);
+
+ private final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
+ private Admin admin;
+
+ @Rule
+ public TestName name = new TestName();
+
+ @Before
+ public void setup() throws Exception {
+ TEST_UTIL.startMiniCluster(1);
+ admin = TEST_UTIL.getAdmin();
+ }
+
+ @After
+ public void tearDown() throws IOException {
+ admin.close();
+ TEST_UTIL.shutdownMiniCluster();
+ TEST_UTIL.getTestFileSystem().delete(TEST_UTIL.getDataTestDir(), true);
+ }
+
+ @Test
+ public void testSnapshotTableWithoutAnyData() throws IOException {
+ // Create a table without any data
+ TableName tableName = TableName.valueOf(name.getMethodName());
+ TableDescriptorBuilder tableDescriptorBuilder =
TableDescriptorBuilder.newBuilder(tableName);
+ ColumnFamilyDescriptor columnFamilyDescriptor =
+ ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("info")).build();
+ tableDescriptorBuilder.setColumnFamily(columnFamilyDescriptor);
+ admin.createTable(tableDescriptorBuilder.build());
+ assertTrue(admin.tableExists(tableName));
+
+ String snapshotName = "snapshot_" + name.getMethodName();
+ admin.snapshot(snapshotName, tableName);
+
+ Optional<SnapshotDescription> optional =
+ admin.listSnapshots().stream().filter(s ->
snapshotName.equals(s.getName())).findFirst();
+ SnapshotDescription snapshotDescription = optional.orElseThrow();
+
+ SnapshotInfo.SnapshotStats snapshotStats =
+ SnapshotInfo.getSnapshotStats(TEST_UTIL.getConfiguration(),
snapshotDescription);
+ assertEquals(0L, snapshotStats.getStoreFilesSize());
+ assertEquals(0, snapshotStats.getSharedStoreFilePercentage(), 0);
+
+ admin.deleteSnapshot(snapshotName);
+ admin.disableTable(tableName);
+ admin.deleteTable(tableName);
+ }
+
+ @Test
+ public void testSnapshotMobTableWithoutAnyData() throws IOException {
+ // Create a MOB table without any data
+ TableName tableName = TableName.valueOf(name.getMethodName());
+ TableDescriptorBuilder tableDescriptorBuilder =
TableDescriptorBuilder.newBuilder(tableName);
+ ColumnFamilyDescriptor columnFamilyDescriptor =
+
ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("info")).setMobEnabled(true).build();
+ tableDescriptorBuilder.setColumnFamily(columnFamilyDescriptor);
+ admin.createTable(tableDescriptorBuilder.build());
+ assertTrue(admin.tableExists(tableName));
+
+ String snapshotName = "snapshot_" + name.getMethodName();
+ admin.snapshot(snapshotName, tableName);
+
+ Optional<SnapshotDescription> optional =
+ admin.listSnapshots().stream().filter(s ->
snapshotName.equals(s.getName())).findFirst();
+ SnapshotDescription snapshotDescription = optional.orElseThrow();
+
+ SnapshotInfo.SnapshotStats snapshotStats =
+ SnapshotInfo.getSnapshotStats(TEST_UTIL.getConfiguration(),
snapshotDescription);
+ assertEquals(0L, snapshotStats.getStoreFilesSize());
+ assertEquals(0, snapshotStats.getSharedStoreFilePercentage(), 0);
+ assertEquals(0, snapshotStats.getMobStoreFilePercentage(), 0);
+
+ admin.deleteSnapshot(snapshotName);
+ admin.disableTable(tableName);
+ admin.deleteTable(tableName);
+ }
+}
