try to fix travis CI

server/src/main/java/org/apache/iotdb/db/service/IoTDB.java

@@ -107,6 +107,7 @@ private void setUp() throws StartupException {
     registerManager.register(TVListAllocator.getInstance());
     registerManager.register(CacheHitRatioMonitor.getInstance());
     JMXService.registerMBean(getInstance(), mbeanName);
+    registerManager.register(RPCService.getInstance());
     registerManager.register(StorageEngine.getInstance());
 
     // When registering statMonitor, we should start recovering some statistics
@@ -116,7 +117,6 @@ private void setUp() throws StartupException {
       StatMonitor.getInstance().recovery();
     }
 
-    registerManager.register(RPCService.getInstance());
     if (IoTDBDescriptor.getInstance().getConfig().isEnableMetricService()) {
       registerManager.register(MetricsService.getInstance());
     }

server/src/test/java/org/apache/iotdb/db/engine/merge/MergeTest.java

@@ -71,13 +71,16 @@ abstract class MergeTest {
   List<TsFileResource> unseqResources = new ArrayList<>();
 
   private int prevMergeChunkThreshold;
+  private boolean prevEnableUnseqCompaction;
 
   @Before
   public void setUp() throws IOException, WriteProcessException, MetadataException {
     IoTDB.metaManager.init();
     prevMergeChunkThreshold =
         IoTDBDescriptor.getInstance().getConfig().getMergeChunkPointNumberThreshold();
+    prevEnableUnseqCompaction = IoTDBDescriptor.getInstance().getConfig().isEnableUnseqCompaction();
     IoTDBDescriptor.getInstance().getConfig().setMergeChunkPointNumberThreshold(-1);
+    IoTDBDescriptor.getInstance().getConfig().setEnableUnseqCompaction(true);
     prepareSeries();
     prepareFiles(seqFileNum, unseqFileNum);
     MergeManager.getINSTANCE().start();
@@ -88,7 +91,9 @@ public void tearDown() throws IOException, StorageEngineException {
     removeFiles();
     seqResources.clear();
     unseqResources.clear();
-    IoTDBDescriptor.getInstance().getConfig().setMergeChunkPointNumberThreshold(prevMergeChunkThreshold);
+    IoTDBDescriptor.getInstance().getConfig()
+        .setMergeChunkPointNumberThreshold(prevMergeChunkThreshold);
+    IoTDBDescriptor.getInstance().getConfig().setEnableUnseqCompaction(prevEnableUnseqCompaction);
     ChunkCache.getInstance().clear();
     ChunkMetadataCache.getInstance().clear();
     TimeSeriesMetadataCache.getInstance().clear();

server/src/test/java/org/apache/iotdb/db/integration/IOTDBGroupByIT.java

@@ -20,6 +20,7 @@
 package org.apache.iotdb.db.integration;
 
 import org.apache.iotdb.db.conf.IoTDBDescriptor;
+import org.apache.iotdb.db.engine.compaction.CompactionStrategy;
 import org.apache.iotdb.db.utils.EnvironmentUtils;
 import org.apache.iotdb.jdbc.Config;
 import org.junit.After;
@@ -105,6 +106,7 @@ public void setUp() throws Exception {
     EnvironmentUtils.closeStatMonitor();
     prevPartitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
     IoTDBDescriptor.getInstance().getConfig().setPartitionInterval(1000);
+    IoTDBDescriptor.getInstance().getConfig().setEnableUnseqCompaction(false);
     EnvironmentUtils.envSetUp();
     Class.forName(Config.JDBC_DRIVER_NAME);
     prepareData();

server/src/test/java/org/apache/iotdb/db/integration/IoTDBOverlappedPageIT.java

@@ -20,6 +20,7 @@
 package org.apache.iotdb.db.integration;
 
 import org.apache.iotdb.db.conf.IoTDBDescriptor;
+import org.apache.iotdb.db.engine.compaction.CompactionStrategy;
 import org.apache.iotdb.db.utils.EnvironmentUtils;
 import org.apache.iotdb.jdbc.Config;
 import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor;
@@ -53,6 +54,7 @@ public static void setUp() throws Exception {
     // max_number_of_points_in_page = 10
     beforeMaxNumberOfPointsInPage = TSFileDescriptor.getInstance().getConfig().getMaxNumberOfPointsInPage();
     TSFileDescriptor.getInstance().getConfig().setMaxNumberOfPointsInPage(10);
+
     EnvironmentUtils.envSetUp();
     Class.forName(Config.JDBC_DRIVER_NAME);
     insertData();

server/src/test/java/org/apache/iotdb/db/integration/IoTDBRemovePartitionIT.java

@@ -29,7 +29,9 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import org.apache.iotdb.db.conf.IoTDBDescriptor;
 import org.apache.iotdb.db.engine.StorageEngine;
+import org.apache.iotdb.db.engine.compaction.CompactionStrategy;
 import org.apache.iotdb.db.exception.StorageEngineException;
 import org.apache.iotdb.db.exception.metadata.IllegalPathException;
 import org.apache.iotdb.db.metadata.PartialPath;
@@ -42,20 +44,26 @@
 public class IoTDBRemovePartitionIT {
 
   private static int partitionInterval = 100;
+  private static CompactionStrategy compactionStrategy;
 
   @Before
   public void setUp() throws Exception {
     EnvironmentUtils.closeStatMonitor();
     EnvironmentUtils.envSetUp();
     StorageEngine.setEnablePartition(true);
     StorageEngine.setTimePartitionInterval(partitionInterval);
+
+    compactionStrategy = IoTDBDescriptor.getInstance().getConfig().getCompactionStrategy();
+    IoTDBDescriptor.getInstance().getConfig()
+        .setCompactionStrategy(CompactionStrategy.NO_COMPACTION);
     insertData();
   }
 
   @After
   public void tearDown() throws Exception {
     StorageEngine.setEnablePartition(false);
     StorageEngine.setTimePartitionInterval(-1);
+    IoTDBDescriptor.getInstance().getConfig().setCompactionStrategy(compactionStrategy);
     EnvironmentUtils.cleanEnv();
   }
 

server/src/test/java/org/apache/iotdb/db/utils/EnvironmentUtils.java

@@ -69,8 +69,8 @@ public class EnvironmentUtils {
   public static QueryContext TEST_QUERY_CONTEXT = new QueryContext(TEST_QUERY_JOB_ID);
 
   private static final long oldTsFileThreshold = config.getTsFileSizeThreshold();
-
   private static final long oldGroupSizeInByte = config.getMemtableSizeThreshold();
+  private static final boolean oldEnableUnseqCompaction = config.isEnableUnseqCompaction();
 
   private static IoTDB daemon;
 
@@ -135,6 +135,7 @@ public static void cleanEnv() throws IOException, StorageEngineException {
     cleanAllDir();
     config.setTsFileSizeThreshold(oldTsFileThreshold);
     config.setMemtableSizeThreshold(oldGroupSizeInByte);
+    config.setEnableUnseqCompaction(oldEnableUnseqCompaction);
   }
 
 
@@ -233,6 +234,8 @@ public static void envSetUp() {
     //we do not start 8181 port in test.
     IoTDBDescriptor.getInstance().getConfig().setEnableMetricService(false);
     IoTDBDescriptor.getInstance().getConfig().setAvgSeriesPointNumberThreshold(Integer.MAX_VALUE);
+    IoTDBDescriptor.getInstance().getConfig().setEnableUnseqCompaction(false);
+
     if (daemon == null) {
       daemon = new IoTDB();
     }