SQLiteDatabaseLockedException 1.7.5版本崩溃

[gaomh1993]

老师您好：
我在使用1.7.5版本的时候发生了多次上报的崩溃现象，我是在单任务执行的情况下同时下载两个文件。日志如下 该问题主要集中在4.2.2和4.4.2中，还有我在下载过程中会有个极小概率的crash空指针问题，是否会对此造成影响
Caused by: android.database.sqlite.SQLiteDatabaseLockedException: database is locked (code 5)
2.at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(Native Method)
3.at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:734)
4.at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)
5.at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)
6.at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1674)
7.at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1603)
8.at com.networkbench.agent.impl.instrumentation.NBSSQLiteInstrumentation.execSQL(SourceFile:2)
9.at com.liulishuo.filedownloader.h0.d.q(SourceFile:1)
10.at com.liulishuo.filedownloader.h0.c.z(SourceFile:5)
11.at com.liulishuo.filedownloader.h0.c.v(SourceFile:1)
12.at com.liulishuo.filedownloader.h0.c$a.handleMessage(SourceFile:6)
13.at android.os.Handler.dispatchMessage(Handler.java:95)
14.at android.os.Looper.loop(Looper.java:137)
15.at android.os.HandlerThread.run(HandlerThread.java:61)