HDDS-8534. Enable asynchronous service logging

hadoop-ozone/dist/src/shell/conf/log4j.properties

@@ -46,6 +46,14 @@ log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} [%t] %p %c: %m%n
 # Debugging Pattern format
 #log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} [%t] %-5p %c{2} (%F:%M(%L)) - %m%n
 
+#
+# Async Rolling File Appender
+#
+log4j.appender.ASYNCRFA=org.apache.hadoop.ozone.utils.AsyncRollingFileAppender
+log4j.appender.ASYNCRFA.fileName=${hadoop.log.dir}/${hadoop.log.file}
+log4j.appender.ASYNCRFA.maxFileSize=${hadoop.log.maxfilesize}
+log4j.appender.ASYNCRFA.maxBackupIndex=${hadoop.log.maxbackupindex}
+log4j.appender.ASYNCRFA.conversionPattern=%d{ISO8601} [%t] %p %c: %m%n
 
 #
 # Daily Rolling File Appender

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/utils/AsyncRollingFileAppender.java

@@ -0,0 +1,128 @@
+/*
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ozone.utils;
+
+import java.io.IOException;
+
+import org.apache.log4j.AsyncAppender;
+import org.apache.log4j.PatternLayout;
+import org.apache.log4j.RollingFileAppender;
+import org.apache.log4j.spi.LoggingEvent;
+
+/**
+ * The AsyncRollingFileAppender shall take the required parameters for supplying
+ * RollingFileAppender to AsyncAppender.
+ */
+public class AsyncRollingFileAppender extends AsyncAppender {
+
+  private String maxFileSize = String.valueOf(10 * 1024 * 1024);
+
+  private int maxBackupIndex = 1;
+
+  private String fileName = null;
+
+  private String conversionPattern = null;
+
+  private boolean blocking = true;
+
+  private int bufferSize = DEFAULT_BUFFER_SIZE;
+
+  private RollingFileAppender rollingFileAppender = null;
+
+  private volatile boolean isRollingFileAppenderAssigned = false;
+
+  @Override
+  public void append(LoggingEvent event) {
+    if (rollingFileAppender == null) {
+      createRollingFileAppender();
+    }
+    super.append(event);
+  }
+
+  private synchronized void createRollingFileAppender() {
+    if (!isRollingFileAppenderAssigned) {
+      PatternLayout patternLayout;
+      if (conversionPattern != null) {
+        patternLayout = new PatternLayout(conversionPattern);
+      } else {
+        patternLayout = new PatternLayout();
+      }
+      try {
+        rollingFileAppender =
+            new RollingFileAppender(patternLayout, fileName, true);
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+      rollingFileAppender.setMaxBackupIndex(maxBackupIndex);
+      rollingFileAppender.setMaxFileSize(maxFileSize);
+      this.addAppender(rollingFileAppender);
+      isRollingFileAppenderAssigned = true;
+      super.setBlocking(blocking);
+      super.setBufferSize(bufferSize);
+    }
+  }
+
+  public synchronized String getMaxFileSize() {
+    return maxFileSize;
+  }
+
+  public synchronized void setMaxFileSize(String maxFileSize) {
+    this.maxFileSize = maxFileSize;
+  }
+
+  public synchronized int getMaxBackupIndex() {
+    return maxBackupIndex;
+  }
+
+  public synchronized void setMaxBackupIndex(int maxBackupIndex) {
+    this.maxBackupIndex = maxBackupIndex;
+  }
+
+  public synchronized String getFileName() {
+    return fileName;
+  }
+
+  public synchronized void setFileName(String fileName) {
+    this.fileName = fileName;
+  }
+
+  public synchronized String getConversionPattern() {
+    return conversionPattern;
+  }
+
+  public synchronized void setConversionPattern(String conversionPattern) {
+    this.conversionPattern = conversionPattern;
+  }
+
+  public boolean isBlocking() {
+    return blocking;
+  }
+
+  public synchronized void setBlocking(boolean blocking) {
+    this.blocking = blocking;
+  }
+
+  public synchronized int getBufferSize() {
+    return bufferSize;
+  }
+
+  public synchronized void setBufferSize(int bufferSize) {
+    this.bufferSize = bufferSize;
+  }
+}

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/utils/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Utility classes for Ozone.
+ */
+package org.apache.hadoop.ozone.utils;