SQLiteDatabaseLockedException: database is locked

今天项目刚灰度，就发现线上异常：

android.database.sqlite.SQLiteDatabaseLockedException: database is locked (Sqlite code 5), (OS error - 11:Try again)

google了一下这个异常也没有好的解决方案，都说保证单例访问就可以，查看我的代码没有毛病，都是加了锁的，这就见鬼了

只能sqlite翻看源码

从异常上可以看出最后调用nativeExecuteForChangedRowCount方法，找到源码看看android_database_SQLiteConnection.cpp

static jint nativeExecuteForChangedRowCount(JNIEnv* env, jclass clazz,jlong connectionPtr, jlong statementPtr) {SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);// 会调用executeNonQuery int err = executeNonQuery(env, connection, statement);return err == SQLITE_DONE ? sqlite3_changes(connection->db) : -1;
}

接下来看executeNonQuery代码

static int executeNonQuery(JNIEnv* env, SQLiteConnection* connection, sqlite3_stmt* statement) {int err = sqlite3_step(statement);if (err == SQLITE_ROW) {throw_sqlite3_exception(env,"Queries can be performed using SQLiteDatabase query or rawQuery methods only.");} else if (err != SQLITE_DONE) {throw_sqlite3_exception(env, connection->db);}return err;
}

executeNonQuery 代码会调用throw_sqlite3_exception抛出异常，找到throw_sqlite3_exception实现throw_sqlite3_exception

void throw_sqlite3_exception(JNIEnv* env, int errcode,const char* sqlite3Message, const char* message) {const char* exceptionClass;switch (errcode) {case SQLITE_IOERR:exceptionClass = "android/database/sqlite/SQLiteDiskIOException";break;case SQLITE_CORRUPT:case SQLITE_NOTADB: // treat "unsupported file format" error as corruption alsoexceptionClass = "android/database/sqlite/SQLiteDatabaseCorruptException";break;case SQLITE_CONSTRAINT:exceptionClass = "android/database/sqlite/SQLiteConstraintException";break;case SQLITE_ABORT:exceptionClass = "android/database/sqlite/SQLiteAbortException";break;case SQLITE_DONE:exceptionClass = "android/database/sqlite/SQLiteDoneException";break;case SQLITE_FULL:exceptionClass = "android/database/sqlite/SQLiteFullException";break;case SQLITE_MISUSE:exceptionClass = "android/database/sqlite/SQLiteMisuseException";break;case SQLITE_PERM:exceptionClass = "android/database/sqlite/SQLiteAccessPermException";break;case SQLITE_BUSY:// 这个就是抛出JAVA数据库锁的异常exceptionClass = "android/database/sqlite/SQLiteDatabaseLockedException";break;case SQLITE_LOCKED:exceptionClass = "android/database/sqlite/SQLiteTableLockedException";break;case SQLITE_READONLY:exceptionClass = "android/database/sqlite/SQLiteReadOnlyDatabaseException";break;case SQLITE_CANTOPEN:exceptionClass = "android/database/sqlite/SQLiteCantOpenDatabaseException";break;case SQLITE_TOOBIG:exceptionClass = "android/database/sqlite/SQLiteBlobTooBigException";break;case SQLITE_RANGE:exceptionClass = "android/database/sqlite/SQLiteBindOrColumnIndexOutOfRangeException";break;case SQLITE_NOMEM:exceptionClass = "android/database/sqlite/SQLiteOutOfMemoryException";break;case SQLITE_MISMATCH:exceptionClass = "android/database/sqlite/SQLiteDatatypeMismatchException";break;case SQLITE_INTERRUPT:exceptionClass = "android/content/OperationCanceledException";break;default:exceptionClass = "android/database/sqlite/SQLiteException";break;}

看到SQLITE_BUSY就是我们对应的JAVA 异常 SQLITE_BUSY什么意思呢，google 一下没找到，只能去官网上看了。

SQLITE_BUSY

官方解析如下

The SQLITE_BUSY result code indicates that the database file could not be written (or in some cases read) because of concurrent activity by some other database connection, usually a database connection in a separate process.

翻译过来就是： SQLITE_BUSY 状态表示当前数据库文件不能写入，因为被其他进程占用

For example, if process A is in the middle of a large write transaction and at the same time process B attempts to start a new write transaction, process B will get back an SQLITE_BUSY result because SQLite only supports one writer at a time. Process B will need to wait for process A to finish its transaction before starting a new transaction. The sqlite3_busy_timeout() and sqlite3_busy_handler() interfaces and the busy_timeout pragma are available to process B to help it deal with SQLITE_BUSY errors.

An SQLITE_BUSY error can occur at any point in a transaction: when the transaction is first started, during any write or update operations, or when the transaction commits. To avoid encountering SQLITE_BUSY errors in the middle of a transaction, the application can use BEGIN IMMEDIATE instead of just BEGIN to start a transaction. The BEGIN IMMEDIATE command might itself return SQLITE_BUSY, but if it succeeds, then SQLite guarantees that no subsequent operations on the same database through the next COMMIT will return SQLITE_BUSY.

所以从JAVA层处理该异常可以 try 一下。或则稍后重试。

SQLiteDatabaseLockedException: database is locked相关推荐

golang sqlite数据库 rows.Close()造成错误database is locked
在最近的一个程序中,使用的是sqlite数据库.涉及到多线程对数据库的读写.因为sqlite本身有五个锁状态:unlocked,shared,reserved,pending,exclusive.每个 ...
sqlite database is locked 问题解决方案
这两天在项目中用大强度大频率的方法测试时遇到sqlite报database is locked的问题, 分析下来原因是sqlite对数据库做修改操作时会做(文件)锁使得其它进程同一时间使用时会报该错误 ...
sqlite3.OperationalError: database is locked
情景描述 windows上代码文件,设置为共享目录,mount到linux使用.运行python manage.py migrate,出现错误报错 [root@localhost sqlalchem ...
使用FMDB多线程訪问数据库，及database is locked的问题
今天最终攻克了多线程同一时候訪问数据库时,报数据库锁定的问题.错误信息是: Unknown error finalizing or resetting statement (5: database i ...
python database is locked_sqlite遇到database is locked问题的完美解决
这两天在项目中用大强度大频率的方法测试时遇到sqlite报database is locked的问题, 分析下来原因是sqlite对数据库做修改操作时会做(文件)锁使得其它进程同一时间使用时会报该错误 ...
svn: E200033: database is locked, executing statement 'RELEASE s0' 问题解决办法
前几天svn迁移到其他路径之后,今天早上更新代码时,出现了下面的问题: svn: E200033: database is locked, executing statement 'RELEASE ...
hue集成mysql报错_hue集成hive访问报database is locked
这个问题这应该是hue默认的SQLite数据库出现错误,你可以使用mysql postgresql等来替换 hue默认使用sqlite作为元数据库,不推荐在生产环境中使用.会经常出现database ...
sqlite遇到database is locked问题的完美解决
这两天在项目中用大强度大频率的方法测试时遇到sqlite报database is locked的问题, 分析下来原因是sqlite对数据库做修改操作时会做(文件)锁使得其它进程同一时间使用时会报该错误 ...
dpkg: error: dpkg status database is locked by another process
解压报错 : root@ubuntu:~# dpkg -i zabbix-release_4.2-2+xenial_all.deb dpkg: error: dpkg status database ...
dpkg: error: dpkg status database is locked by another process 解决方法
dpkg: error: dpkg status database is locked by another process 解决方法参考文章: (1)dpkg: error: dpkg statu ...

SQLiteDatabaseLockedException: database is locked

SQLiteDatabaseLockedException: database is locked相关推荐

最新文章

热门文章