diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0876cc1..8d2eec5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.1.17] - 2021-12-10
+
+### Changed
+
+- Only create log file before process being really running.
+- Fix bug of sysvinit upgrade.
+- Use x86_64 as default Windows target.
+
 ## [0.1.16] - 2021-12-09
 
 ### Changed
diff --git a/Cargo.lock b/Cargo.lock
index 58e2ec3..4c89ebb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2427,7 +2427,7 @@ dependencies = [
 
 [[package]]
 name = "tat_agent"
-version = "0.1.16"
+version = "0.1.17"
 dependencies = [
  "async-attributes",
  "async-std",
diff --git a/Cargo.toml b/Cargo.toml
index 0498d38..24787c2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tat_agent"
-version = "0.1.16"
+version = "0.1.17"
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/install/build.bat b/install/build.bat
index 94fef02..cfabd0e 100644
--- a/install/build.bat
+++ b/install/build.bat
@@ -1,4 +1,4 @@
 SET RUSTFLAGS=-C target-feature=+crt-static
-rustup target add i686-pc-windows-msvc
-cargo build --release --target i686-pc-windows-msvc
-copy /Y target\i686-pc-windows-msvc\release\tat_agent.exe install\tat_agent.exe
\ No newline at end of file
+rustup target add x86_64-pc-windows-msvc
+cargo build --release --target x86_64-pc-windows-msvc
+copy /Y target\x86_64-pc-windows-msvc\release\tat_agent.exe install\tat_agent.exe
\ No newline at end of file
diff --git a/install/install.sh b/install/install.sh
index a2527af..10b6a7f 100755
--- a/install/install.sh
+++ b/install/install.sh
@@ -91,10 +91,9 @@ install() {
   elif has_sysvinit; then
       cp -f tat_agent_service /etc/init.d/
       chmod 755 /etc/init.d/tat_agent_service
-      # TODO: uncomment following code after 0.1.15 is released.
-      # if test "${need_restart}" = true; then
-      /etc/init.d/tat_agent_service restart
-      # fi
+      if test "${need_restart}" = true; then
+          /etc/init.d/tat_agent_service restart
+      fi
       which chkconfig > /dev/null 2>&1
       if [ $? -eq 0 ]; then
           echo "use chkconfig to manage service"
@@ -110,17 +109,16 @@ install() {
           fi
       fi
   else
-      # TODO: uncomment following code after 0.1.15 is released.
-      # if test "${need_restart}" = true; then
-      echo "no proper daemon manager found, tat_agent can not auto start"
-      PID=$(cat ${PID_FILE})
-      kill ${PID} > /dev/null 2>&1
-      sleep 0.1 || sleep 1
-      rm -f ${PID_FILE}
-      cd ${SERVICE_DIR}
-      ./${TAT_AGENT}
-      echo "tat_agent started"
-      # fi
+      if test "${need_restart}" = true; then
+          echo "no proper daemon manager found, tat_agent can not auto start"
+          PID=$(cat ${PID_FILE})
+          kill ${PID} > /dev/null 2>&1
+          sleep 0.1 || sleep 1
+          rm -f ${PID_FILE}
+          cd ${SERVICE_DIR}
+          ./${TAT_AGENT}
+          echo "tat_agent started"
+      fi
   fi
 }
 
diff --git a/install/tat_agent_service b/install/tat_agent_service
index 7c6e49f..0d7d723 100644
--- a/install/tat_agent_service
+++ b/install/tat_agent_service
@@ -43,6 +43,7 @@ stop() {
             echo "tat_agent not found, nothing to stop"
             RET=2
         fi
+        rm -f ${PID_FILE}
     else
         echo "pid file of tat_agent not exist"
         RET=3
diff --git a/src/common/consts.rs b/src/common/consts.rs
index c5b29ba..e19a004 100644
--- a/src/common/consts.rs
+++ b/src/common/consts.rs
@@ -31,7 +31,7 @@ cfg_if::cfg_if! {
     } else if #[cfg(windows)] {
         pub const TASK_STORE_PATH: &str = "C:\\Program Files\\qcloud\\tat_agent\\tmp\\commands\\";
         pub const TASK_LOG_PATH: &str = "C:\\Program Files\\qcloud\\tat_agent\\tmp\\logs\\";
-        pub const SELF_UPDATE_PATH: &str = "C:\\Program Files\\qcloud\\tat_agent\\tmp\\self_update";
+        pub const SELF_UPDATE_PATH: &str = "C:\\Program Files\\qcloud\\tat_agent\\tmp\\self_update\\";
         pub const SELF_UPDATE_SCRIPT: &str = "self_update.bat";
     }
 }
diff --git a/src/executor/powershell_command.rs b/src/executor/powershell_command.rs
index 71bfd8c..9c99a14 100644
--- a/src/executor/powershell_command.rs
+++ b/src/executor/powershell_command.rs
@@ -4,13 +4,13 @@ use crate::start_failed_err_info;
 use async_trait::async_trait;
 use codepage_strings::Coding;
 use core::mem;
-use log::{debug, error, info};
+use log::{debug, error, info, warn};
 use rand::distributions::Alphanumeric;
 use rand::{thread_rng, Rng};
 use std::ffi::OsStr;
 use std::fmt;
 use std::fmt::{Debug, Formatter};
-use std::fs::{File, OpenOptions};
+use std::fs::{remove_file, File, OpenOptions};
 use std::io::Write;
 use std::os::windows::ffi::OsStrExt;
 use std::path::Path;
@@ -104,8 +104,6 @@ impl PowerShellCommand {
 impl MyCommand for PowerShellCommand {
     /* TODO:
     1. support set username
-    2. support kill process when cancelled or timout.
-    3. support set process group.
      */
     async fn run(&mut self) -> Result<(), String> {
         info!("=>PowerShellCommand::run()");
@@ -115,15 +113,18 @@ impl MyCommand for PowerShellCommand {
         // work dir check
         self.work_dir_check()?;
 
-        let log_file = self.open_log_file()?;
-
         // create pipe
         let (our_pipe, their_pipe) = anon_pipe(true)?;
 
         // start child
         let mut cmd = self.prepare_cmd(their_pipe)?;
+        let log_file = self.open_log_file()?;
         let mut child = cmd.spawn().map_err(|e| {
             *self.base.err_info.lock().unwrap() = e.to_string();
+            // remove log_file when process run failed.
+            if let Err(e) = remove_file(self.base.log_file_path.as_str()) {
+                warn!("remove log file failed: {:?}", e)
+            }
             format!(
                 "PowerShellCommand {}, working_directory:{}, start fail: {}",
                 self.base.cmd_path, self.base.work_dir, e
diff --git a/src/executor/proc.rs b/src/executor/proc.rs
index 9473263..c7e744d 100644
--- a/src/executor/proc.rs
+++ b/src/executor/proc.rs
@@ -11,7 +11,7 @@ use crate::common::asserts::GracefulUnwrap;
 use crate::common::consts::{
     FINISH_RESULT_FAILED, FINISH_RESULT_START_FAILED, FINISH_RESULT_SUCCESS,
     FINISH_RESULT_TERMINATED, FINISH_RESULT_TIMEOUT, METADATA_API, OUTPUT_BYTE_LIMIT_EACH_REPORT,
-    TASK_LOG_PATH, TASK_STORE_PATH,
+    TASK_STORE_PATH,
 };
 use crate::cos::ObjectAPI;
 use crate::cos::COS;
@@ -19,9 +19,10 @@ use crate::http::MetadataAPIAdapter;
 use crate::ontime::timer::Timer;
 use crate::start_failed_err_info;
 use async_trait::async_trait;
-use log::{debug, error, info};
+use log::{debug, error, info, warn};
 use std::fmt;
-use std::fs::{File, OpenOptions};
+use std::fs::{create_dir_all, File, OpenOptions};
+use std::path::Path;
 use std::sync::atomic::Ordering::SeqCst;
 use std::sync::atomic::{AtomicBool, AtomicU32, AtomicU64, Ordering};
 use std::sync::{Arc, Mutex};
@@ -468,17 +469,32 @@ impl BaseCommand {
                 start_failed_err_info!(ERR_SCRIPT_FILE_STORE_FAILED, TASK_STORE_PATH);
             return Err(ret);
         }
-        if self.log_file_path.is_empty() {
-            let ret = format!("start fail because log file store failed.");
-            *self.err_info.lock().unwrap() =
-                start_failed_err_info!(ERR_LOG_FILE_STORE_FAILED, TASK_LOG_PATH);
-            return Err(ret);
-        }
         Ok(())
     }
 
     fn open_log_file(&self) -> Result<File, String> {
+        let parent = Path::new(self.log_file_path.as_str()).parent();
+        match parent {
+            Some(parent) => {
+                if let Err(e) = create_dir_all(parent) {
+                    return Err(format!(
+                        "fail to open task log file {}: create parent dir fail {}: {:?}",
+                        self.log_file_path,
+                        parent.display(),
+                        e
+                    ));
+                }
+            }
+            None => {
+                warn!(
+                    "parent dir not found, skip: {}",
+                    self.log_file_path.as_str()
+                )
+            }
+        }
+
         let res = OpenOptions::new()
+            .create(true)
             .write(true)
             .open(self.log_file_path.clone());
         match res {
@@ -596,10 +612,10 @@ impl BaseCommand {
 }
 #[cfg(test)]
 mod tests {
+    use std::fs;
     use std::fs::File;
     use std::io::Write;
     use std::time::{Duration, Instant, SystemTime};
-    use std::fs;
 
     use log::info;
     use rand::distributions::Alphanumeric;
@@ -683,7 +699,6 @@ mod tests {
         init_log();
         // it doesn't matter even if ./a.sh not exist
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             CMD_PATH,
             &username(),
@@ -700,7 +715,7 @@ mod tests {
         let ret = cmd.run().await;
         assert!(ret.is_ok());
         info!("cmd running, pid:{}", cmd.pid());
-        tokio::time::delay_for(Duration::from_secs(4)).await;
+        tokio::time::delay_for(Duration::from_secs(10)).await;
         // now it's NOT a defunct process, cmd will be auto-waited
         assert!(!is_process_exist(cmd.pid()).await);
         //thread::sleep(Duration::new(10, 0));
@@ -824,7 +839,6 @@ mod tests {
             }
         }
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             filename.as_str(),
             &username(),
@@ -879,7 +893,6 @@ mod tests {
             }
         }
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             filename.as_str(),
             &username(),
@@ -965,7 +978,6 @@ mod tests {
             }
         }
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             filename.as_str(),
             &username(),
@@ -1020,9 +1032,8 @@ mod tests {
             .duration_since(SystemTime::UNIX_EPOCH)
             .unwrap()
             .as_secs();
-        info!("script {} start_time:{}",filename, start_time);
+        info!("script {} start_time:{}", filename, start_time);
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             filename.as_str(),
             &username(),
@@ -1076,7 +1087,6 @@ mod tests {
         let filename = format!("./.{}.sh", gen_rand_str());
         create_file("echo 'hello world'\nsleep 10 &\ndate", filename.as_str());
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             filename.as_str(),
             &username(),
@@ -1123,7 +1133,6 @@ mod tests {
         );
 
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let ret = new(
             filename.as_str(),
             &username(),
diff --git a/src/executor/shell_command.rs b/src/executor/shell_command.rs
index 63a3215..08d5e34 100755
--- a/src/executor/shell_command.rs
+++ b/src/executor/shell_command.rs
@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 use std::fmt::Debug;
-use std::fs::File;
+use std::fs::{remove_file, File};
 use std::io::Write;
 use std::path::Path;
 use std::process::Stdio;
@@ -13,7 +13,7 @@ use crate::executor::proc::{BaseCommand, MyCommand};
 use crate::start_failed_err_info;
 use async_trait::async_trait;
 use libc;
-use log::{debug, error, info};
+use log::{debug, error, info, warn};
 use procfs::process::Process;
 use tokio::io::{AsyncReadExt, BufReader};
 use tokio::process::{Child, Command};
@@ -147,10 +147,13 @@ impl MyCommand for ShellCommand {
         let user = self.user_check()?;
 
         let log_file = self.open_log_file()?;
-
         // start the process async
         let mut child = self.prepare_cmd(user).spawn().map_err(|e| {
             *self.base.err_info.lock().unwrap() = e.to_string();
+            // remove log_file when process run failed.
+            if let Err(e) = remove_file(self.base.log_file_path.as_str()) {
+                warn!("remove log file failed: {:?}", e)
+            }
             format!(
                 "ShellCommand {}, working_directory:{}, start fail: {}",
                 self.base.cmd_path, self.base.work_dir, e
diff --git a/src/http/store.rs b/src/http/store.rs
index b38d418..2b548a8 100644
--- a/src/http/store.rs
+++ b/src/http/store.rs
@@ -173,8 +173,6 @@ impl TaskFileStore {
             return Err("fail to store command in task file".to_string());
         }
 
-        // create task log file
-        let _ = self.create_file(&task_log_path, true, false)?;
         Ok((task_file_path, task_log_path))
     }
 
@@ -230,11 +228,10 @@ mod tests {
             desired_path
         );
 
-        let (task_file, log_path) = store.store(&task).unwrap();
+        let (task_file, _) = store.store(&task).unwrap();
         let contents = read_to_string(&task_file).unwrap();
         assert_eq!(contents, "ls -l");
         store.remove(&task_file);
-        store.remove(&log_path);
         let paths = read_dir(Path::new(&task_file).parent().unwrap()).unwrap();
         for f in paths {
             remove_file(f.unwrap().path()).unwrap();
diff --git a/src/http/thread.rs b/src/http/thread.rs
index 5e9c528..4edc601 100644
--- a/src/http/thread.rs
+++ b/src/http/thread.rs
@@ -372,7 +372,7 @@ impl HttpWorker {
         proc_res
             .run()
             .await
-            .map_err(|e| error!("start process fail {}",e))
+            .map_err(|e| error!("start process fail {}", e))
             .ok();
         let cmd_arc = Arc::new(Mutex::new(proc_res));
 
@@ -589,7 +589,6 @@ mod tests {
             .then_return(Ok(ReportTaskFinishResponse {}));
 
         let log_path = format!("./{}.log", gen_rand_str());
-        File::create(log_path.as_str()).unwrap_or_exit("create log path fail.");
         let cmd = http_worker
             .create_proc(filename.as_str(), log_path.as_str(), &task)
             .await
diff --git a/src/ontime/self_update.rs b/src/ontime/self_update.rs
index ac08e59..e35e3a4 100644
--- a/src/ontime/self_update.rs
+++ b/src/ontime/self_update.rs
@@ -272,7 +272,7 @@ fn try_run_agent(
     unzip_dir: String,
     agent_filename: String,
 ) -> Result<String, String> {
-    let agent = format!("{}/{}/{}", path, unzip_dir, agent_filename);
+    let agent = format!("{}{}/{}", path, unzip_dir, agent_filename);
     let cmd = Command::new(agent).arg("--version").output();
     if let Err(e) = cmd {
         return Err(format!("agent run ret: {:?}", e));
@@ -301,7 +301,7 @@ fn run_self_update_script(
     unzip_dir: String,
     script_filename: String,
 ) -> Result<(), String> {
-    let script = format!("{}/{}/{}", path, unzip_dir, script_filename);
+    let script = format!("{}{}/{}", path, unzip_dir, script_filename);
     #[cfg(unix)]
     let cmd = Command::new("sh").arg("-c").arg(script).output();
     #[cfg(windows)]
@@ -326,7 +326,7 @@ fn run_self_update_script(
 pub fn try_restart_agent() -> Result<(), String> {
     cfg_if::cfg_if! {
         if #[cfg(unix)] {
-            let script = format!("{}/{}/{}",
+            let script = format!("{}{}/{}",
                              SELF_UPDATE_PATH.to_string(),
                              UPDATE_FILE_UNZIP_DIR.to_string(),
                              INSTALL_SCRIPT.to_string(),
diff --git a/src/uname/windows.rs b/src/uname/windows.rs
index 5b71cb9..491a0b8 100644
--- a/src/uname/windows.rs
+++ b/src/uname/windows.rs
@@ -9,7 +9,7 @@ impl Uname {
             release: String::from("unknown"),
             version: String::from("unknown"),
             // TODO: need optimized with real arch.
-            machine: String::from("i686"),
+            machine: String::from("x86_64"),
         };
         return Ok(uname);
     }
diff --git a/src/ws/thread.rs b/src/ws/thread.rs
index d1f4c0c..c2effbf 100644
--- a/src/ws/thread.rs
+++ b/src/ws/thread.rs
@@ -70,6 +70,7 @@ pub fn run(
                 .timeout(Duration::from_secs(WS_CONNECT_TIMEOUT))
                 .map_err(|e| {
                     error!("connect fail:{:?}", e);
+                    thread::sleep(time::Duration::from_secs(WS_RECONNECT_INTERVAL));
                     panic!();
                 })
                 .and_then(|(duplex, _)| {