diff --git a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask.kt b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask.kt
index e46b070f..157aa33e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask.kt
@@ -115,26 +115,26 @@ abstract class ColumnTask(
 		return TootApiResult()
 	}
 	
+
+	abstract suspend fun background() : TootApiResult?
+	abstract suspend fun handleResult(result : TootApiResult?)
+
 	fun cancel() {
 		job?.cancel()
 	}
-	
-	abstract suspend fun doInBackground() : TootApiResult?
-	abstract suspend fun onPostExecute(result : TootApiResult?)
-	
+
 	fun start() {
 		job = GlobalScope.launch(Dispatchers.Main) {
-			val result = try {
-				withContext(Dispatchers.IO) {
-					doInBackground()
+			handleResult(
+				try {
+					withContext(Dispatchers.IO) { background() }
+				} catch(ex : CancellationException) {
+					null // キャンセルされたらresult==nullとする
+				} catch(ex : Throwable) {
+					// その他のエラー
+					TootApiResult(ex.withCaption("error"))
 				}
-			} catch(ex : CancellationException) {
-				null // キャンセルされたらresult==nullとする
-			} catch(ex : Throwable) {
-				// その他のエラー
-				TootApiResult(ex.withCaption("error"))
-			}
-			onPostExecute(result)
+			)
 		}
 	}
 }
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Gap.kt b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Gap.kt
index f017227f..a359b487 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Gap.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Gap.kt
@@ -26,7 +26,7 @@ class ColumnTask_Gap(
     private var max_id: EntityId? = (gap as? TootGap)?.max_id
     private var since_id: EntityId? = (gap as? TootGap)?.since_id
 
-    override suspend fun doInBackground(): TootApiResult? {
+    override suspend fun background(): TootApiResult? {
         ctStarted.set(true)
 
         val client = TootApiClient(context, callback = object : TootApiCallback {
@@ -62,7 +62,7 @@ class ColumnTask_Gap(
         }
     }
 
-    override suspend fun onPostExecute(result: TootApiResult?) {
+    override suspend fun handleResult(result: TootApiResult?) {
         if (column.is_dispose.get()) return
 
         if (isCancelled || result == null) {
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Loading.kt b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Loading.kt
index 951ca3d2..68a4407d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Loading.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Loading.kt
@@ -19,7 +19,7 @@ class ColumnTask_Loading(
 
     internal var list_pinned: ArrayList<TimelineItem>? = null
 
-    override suspend fun doInBackground(): TootApiResult? {
+    override suspend fun background(): TootApiResult? {
         ctStarted.set(true)
 
         if (Pref.bpOpenSticker(pref)) {
@@ -72,7 +72,7 @@ class ColumnTask_Loading(
         }
     }
 
-    override suspend fun onPostExecute(result: TootApiResult?) {
+    override suspend fun handleResult(result: TootApiResult?) {
         if (column.is_dispose.get()) return
 
         if (isCancelled || result == null) {
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Refresh.kt b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Refresh.kt
index eccf6f0b..7fe57a15 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Refresh.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ColumnTask_Refresh.kt
@@ -23,7 +23,7 @@ class ColumnTask_Refresh(
 
     private var filterUpdated = false
 
-    override suspend fun doInBackground(): TootApiResult? {
+    override suspend fun background(): TootApiResult? {
         ctStarted.set(true)
 
         val client = TootApiClient(context, callback = object : TootApiCallback {
@@ -65,7 +65,7 @@ class ColumnTask_Refresh(
         }
     }
 
-    override suspend fun onPostExecute(result: TootApiResult?) {
+    override suspend fun handleResult(result: TootApiResult?) {
         if (column.is_dispose.get()) return
 
         if (isCancelled || result == null) {
diff --git a/app/src/main/java/jp/juggler/subwaytooter/notification/JobItem.kt b/app/src/main/java/jp/juggler/subwaytooter/notification/JobItem.kt
index 483e5770..3a784671 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/notification/JobItem.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/notification/JobItem.kt
@@ -14,7 +14,7 @@ import java.util.*
 import java.util.concurrent.atomic.AtomicBoolean
 
 /*
-    JobScheduerに登録する & アプリ内部でも保持するジョブのリスト。
+    JobSchedulerに登録する & アプリ内部でも保持するジョブのリスト。
     アプリ内部で保持するのは主にサービス完了通知のせい
 * */
 class JobItem(
@@ -112,13 +112,13 @@ class JobItem(
                 TaskRunner(pollingWorker, this@JobItem, TaskId.Polling, JsonObject()).runTask()
             }
 
-            log.d("pollingComplete=${bPollingComplete},isJobCancelled=${isJobCancelled},bPollingRequired=${bPollingRequired.get()}")
+            log.w("pollingComplete=${bPollingComplete},isJobCancelled=${isJobCancelled},bPollingRequired=${bPollingRequired.get()}")
             if (!isJobCancelled && bPollingComplete) {
                 // ポーリングが完了した
                 pollingWorker.onPollingComplete(bPollingRequired.get())
             }
         } catch (ex: JobCancelledException) {
-            log.e("job execution cancelled.")
+            log.w("job execution cancelled.")
         } catch (ex: Throwable) {
             log.trace(ex)
             log.e(ex, "job execution failed.")