diff --git a/cat-core/src/main/java/com/dianping/cat/service/HostinfoService.java b/cat-core/src/main/java/com/dianping/cat/service/HostinfoService.java
index 53468c0657822ab30424b3b1bef6436c2e1b6fa4..1b7b24fc5c64261c7abc72bdd30fe0dcfcc7fd55 100644
--- a/cat-core/src/main/java/com/dianping/cat/service/HostinfoService.java
+++ b/cat-core/src/main/java/com/dianping/cat/service/HostinfoService.java
@@ -6,10 +6,13 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
 
 import org.codehaus.plexus.personality.plexus.lifecycle.phase.Initializable;
 import org.codehaus.plexus.personality.plexus.lifecycle.phase.InitializationException;
 import org.unidal.dal.jdbc.DalException;
+import org.unidal.helper.Threads;
+import org.unidal.helper.Threads.Task;
 import org.unidal.lookup.annotation.Inject;
 
 import com.dianping.cat.Cat;
@@ -31,25 +34,25 @@ public class HostinfoService implements Initializable {
 	public boolean deleteHostinfo(Hostinfo host) {
 		int id = host.getId();
 		Iterator<Entry<String, Hostinfo>> iterator = m_hostinfos.entrySet().iterator();
+		String ip = null;
 
 		while (iterator.hasNext()) {
 			Entry<String, Hostinfo> entry = iterator.next();
 			Hostinfo hostinfo = entry.getValue();
 			if (hostinfo.getId() == id) {
-				iterator.remove();
-
-				try {
-					hostinfo.setKeyId(hostinfo.getId());
-					m_hostinfoDao.deleteByPK(hostinfo);
-					return true;
-				} catch (Exception e) {
-					Cat.logError("delete hostinfo error " + hostinfo.toString(), e);
-					return false;
-				}
+				ip = hostinfo.getIp();
+				break;
 			}
 		}
 
-		return true;
+		try {
+			m_hostinfos.remove(ip);
+			m_hostinfoDao.deleteByPK(host);
+			return true;
+		} catch (Exception e) {
+			Cat.logError("delete hostinfo error " + host.toString(), e);
+			return false;
+		}
 	}
 
 	public List<Hostinfo> findAll() throws DalException {
@@ -76,10 +79,17 @@ public class HostinfoService implements Initializable {
 
 	@Override
 	public void initialize() throws InitializationException {
+		Threads.forGroup("Cat").start(new HostinfoReloadTask());
+	}
+
+	public void refresh() {
 		try {
 			List<Hostinfo> hostinfos = m_hostinfoDao.findAllIp(HostinfoEntity.READSET_FULL);
-			for (Hostinfo hostinfo : hostinfos) {
-				m_hostinfos.put(hostinfo.getIp(), hostinfo);
+
+			synchronized (this) {
+				for (Hostinfo hostinfo : hostinfos) {
+					m_hostinfos.put(hostinfo.getIp(), hostinfo);
+				}
 			}
 		} catch (DalException e) {
 			Cat.logError("initialize HostService error", e);
@@ -108,4 +118,39 @@ public class HostinfoService implements Initializable {
 			return false;
 		}
 	}
+
+	public class HostinfoReloadTask implements Task {
+
+		@Override
+		public void run() {
+			boolean active = true;
+
+			while (active) {
+				try {
+					refresh();
+				} catch (Exception ex) {
+					Cat.logError("reload hostinfo error", ex);
+				}
+
+				try {
+					TimeUnit.MINUTES.sleep(1);
+				} catch (InterruptedException ex) {
+					Cat.logError("reload hostinfo stop", ex);
+					active = false;
+				}
+			}
+
+		}
+
+		@Override
+		public String getName() {
+			return "hostinfo-reload";
+		}
+
+		@Override
+		public void shutdown() {
+		}
+
+	}
+
 }
diff --git a/cat-core/src/main/java/com/dianping/cat/service/ProjectService.java b/cat-core/src/main/java/com/dianping/cat/service/ProjectService.java
index 972bf3f1631424d08f6fe321d2e13dfb8142949c..f9ee49f8e16ef493569d0c3b3b4a285b1d4f1dfa 100644
--- a/cat-core/src/main/java/com/dianping/cat/service/ProjectService.java
+++ b/cat-core/src/main/java/com/dianping/cat/service/ProjectService.java
@@ -6,10 +6,13 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
 
 import org.codehaus.plexus.personality.plexus.lifecycle.phase.Initializable;
 import org.codehaus.plexus.personality.plexus.lifecycle.phase.InitializationException;
 import org.unidal.dal.jdbc.DalException;
+import org.unidal.helper.Threads;
+import org.unidal.helper.Threads.Task;
 import org.unidal.lookup.annotation.Inject;
 
 import com.dianping.cat.Cat;
@@ -31,25 +34,26 @@ public class ProjectService implements Initializable {
 	public boolean deleteProject(Project project) {
 		int id = project.getId();
 		Iterator<Entry<String, Project>> iterator = m_projects.entrySet().iterator();
+		String domainName = null;
 
 		while (iterator.hasNext()) {
 			Entry<String, Project> entry = iterator.next();
 			Project pro = entry.getValue();
-			if (pro.getId() == id) {
-				iterator.remove();
 
-				try {
-					pro.setKeyId(pro.getId());
-					m_projectDao.deleteByPK(pro);
-					return true;
-				} catch (Exception e) {
-					Cat.logError("delete project error " + pro.toString(), e);
-					return false;
-				}
+			if (pro.getId() == id) {
+				domainName = pro.getDomain();
+				break;
 			}
 		}
 
-		return true;
+		try {
+			m_projects.remove(domainName);
+			m_projectDao.deleteByPK(project);
+			return true;
+		} catch (Exception e) {
+			Cat.logError("delete project error ", e);
+			return false;
+		}
 	}
 
 	public List<Project> findAll() throws DalException {
@@ -66,20 +70,27 @@ public class ProjectService implements Initializable {
 		while (iterator.hasNext()) {
 			Entry<String, Project> entry = iterator.next();
 			Project pro = entry.getValue();
+
 			if (pro.getId() == id) {
 				return pro;
 			}
 		}
-
 		return new Project();
 	}
 
 	@Override
 	public void initialize() throws InitializationException {
+		Threads.forGroup("Cat").start(new ProjectReloadTask());
+	}
+
+	public void refresh() {
 		try {
 			List<Project> projects = m_projectDao.findAll(ProjectEntity.READSET_FULL);
-			for (Project project : projects) {
-				m_projects.put(project.getDomain(), project);
+
+			synchronized (this) {
+				for (Project project : projects) {
+					m_projects.put(project.getDomain(), project);
+				}
 			}
 		} catch (DalException e) {
 			Cat.logError("initialize ProjectService error", e);
@@ -108,4 +119,38 @@ public class ProjectService implements Initializable {
 			return false;
 		}
 	}
+
+	public class ProjectReloadTask implements Task {
+
+		@Override
+		public void run() {
+			boolean active = true;
+
+			while (active) {
+				try {
+					refresh();
+				} catch (Exception ex) {
+					Cat.logError("reload project error", ex);
+				}
+
+				try {
+					TimeUnit.MINUTES.sleep(1);
+				} catch (InterruptedException ex) {
+					Cat.logError("reload project stop", ex);
+					active = false;
+				}
+			}
+		}
+
+		@Override
+		public String getName() {
+			return "project-reload";
+		}
+
+		@Override
+		public void shutdown() {
+		}
+
+	}
+
 }
diff --git a/cat-home/src/main/resources/META-INF/plexus/components.xml b/cat-home/src/main/resources/META-INF/plexus/components.xml
index f1921f0f214bf77b1120ca38018be6e2abe7a871..a8d6a67b165b28a76402f47dd7d9e2a4ba8c9ade 100755
--- a/cat-home/src/main/resources/META-INF/plexus/components.xml
+++ b/cat-home/src/main/resources/META-INF/plexus/components.xml
@@ -3258,7 +3258,7 @@
 			<implementation>com.dianping.cat.DomainManager</implementation>
 			<requirements>
 				<requirement>
-					<role>com.dianping.cat.core.dal.HostinfoDao</role>
+					<role>com.dianping.cat.service.HostinfoService</role>
 				</requirement>
 				<requirement>
 					<role>com.dianping.cat.service.ProjectService</role>
@@ -3268,6 +3268,15 @@
 				</requirement>
 			</requirements>
 		</component>
+		<component>
+			<role>com.dianping.cat.service.HostinfoService</role>
+			<implementation>com.dianping.cat.service.HostinfoService</implementation>
+			<requirements>
+				<requirement>
+					<role>com.dianping.cat.core.dal.HostinfoDao</role>
+				</requirement>
+			</requirements>
+		</component>
 		<component>
 			<role>com.dianping.cat.core.dal.HostinfoDao</role>
 			<implementation>com.dianping.cat.core.dal.HostinfoDao</implementation>