我有一个 android 应用程序，我执行许多领域操作。我尝试使用处理程序线程来加快数据库操作，但是这次我得到了这些错误。我已经审查了类似的问题，但找不到原因。
12-17 20:07:30.826 6387 8777 W System.err: io.realm.exceptions.RealmFileException: Unable to open a realm at path '/data/data/br.com.gomus.androidapp/files/default.realm': open() failed: Too many open files. (open("/data/data/br.com.gomus.androidapp/files/default.realm") failed: Too many open files) (/data/data/br.com.gomus.androidapp/files/default.realm) in /Users/cm/Realm/realm-java-release/realm/realm-library/src/main/cpp/io_realm_internal_OsSharedRealm.cpp line 101 Kind: ACCESS_ERROR.
12-17 20:07:30.827 6387 8777 W System.err: at io.realm.internal.OsSharedRealm.nativeGetSharedRealm(Native Method)
12-17 20:07:30.827 6387 8777 W System.err: at io.realm.internal.OsSharedRealm.<init>(OsSharedRealm.java:184)
12-17 20:07:30.827 6387 8777 W System.err: at io.realm.internal.OsSharedRealm.getInstance(OsSharedRealm.java:254)
12-17 20:07:30.828 6387 8777 W System.err: at io.realm.internal.OsSharedRealm.getInstance(OsSharedRealm.java:244)
12-17 20:07:30.828 6387 8777 W System.err: at io.realm.RealmCache.doCreateRealmOrGetFromCache(RealmCache.java:319)
12-17 20:07:30.828 6387 8777 W System.err: at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:282)
12-17 20:07:30.828 6387 8777 W System.err: at io.realm.Realm.getDefaultInstance(Realm.java:332)
12-17 20:07:30.828 6387 8777 W System.err: at br.com.gomus.androidapp.data.local.database.LocalDatabaseImpl.findRealmObject(LocalDatabaseImpl.java:284)
12-17 20:07:30.829 6387 8777 W System.err: at br.com.gomus.androidapp.data.local.dao.schedule.SpotScheduleDaoImpl$1.run(SpotScheduleDaoImpl.java:113)
12-17 20:07:30.829 6387 8777 W System.err: at android.os.Handler.handleCallback(Handler.java:755)
12-17 20:07:30.829 6387 8777 W System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
12-17 20:07:30.829 6387 8777 W System.err: at android.os.Looper.loop(Looper.java:154)
12-17 20:07:30.830 6387 8777 W System.err: at android.os.HandlerThread.run(HandlerThread.java:61)
这是SpotScheduleDaoImp.java，第 113 行对应于该mDatabase.findRealmObject(ScheduleCompound.class, query,行。
@Override
public void find(Func1<RealmQuery<ScheduleCompound>, RealmQuery<ScheduleCompound>> query,
Action1<Result<List<ScheduleCompound>>> onResult) {
if (query != null) {
handlerThread = new HandlerThread("MyHandlerThreadspotscheduleDao");
handlerThread.start();
looper = handlerThread.getLooper();
Handler handler = new Handler(looper);
handler.post(new Runnable(){
@Override
public void run() {
Timber.log(Log.DEBUG, "find Thread.currentThread().getName() " + Thread.currentThread().getName());
mDatabase.findRealmObject(ScheduleCompound.class, query,
result -> {
onResult.call(Result.getData(SpotScheduleMapper.copyFromRealmResults(result.data)));
//handlerThread.quit();
},
err -> {
onResult.call(Result.getError(err));
//handlerThread.quit();
}
);
}
});
}
}
这是LocalDatabaseImpl.java，第284行对应于realm = Realm.getDefaultInstance();命令。
public <T extends RealmModel> void findRealmObject(Class<T> clazz,
Func1<RealmQuery<T>, RealmQuery<T>> filter,
Action1<Result<RealmResults<T>>> onResult,
Action1<Throwable> onError) {
Realm realm = null;
RealmResults<T> realmResults = null;
try {
realm = Realm.getDefaultInstance();
RealmQuery<T> realmQuery = filter.call(realm.where(clazz));
Timber.log(Log.DEBUG, "findRealmObject Thread.currentThread().getName() " + Thread.currentThread().getName());
realmResults = realmQuery.findAll();
if(realmResults.isValid()) {
Timber.log(Log.DEBUG, clazz.getCanonicalName() + "findRealmObject realmQuery.findAll = " + realmResults);
onResult.call(Result.getData(realmResults));
}
} catch (Exception e) {
e.printStackTrace();
onError.call(e);
}
finally
{
if(realm != null)
if(realmResults != null && realmResults.isValid())
if(!realm.isClosed()) {
realm.close();
}
}
}
我的理解是关闭领域实例有问题，但我不知道为什么。因为在 finally 块中我关闭了领域实例。在此之前，我在 try 和 catch 块的末尾都关闭了它，方法是检查它是否像这样之前没有关闭!realm.isClosed()但当时它给出了错误并说领域实例已经关闭，使其无法使用。所以我把结束部分移到了 finally 块。
这是另一个堆栈跟踪。
--------- beginning of crash
12-17 20:07:31.796 6387 8776 E AndroidRuntime: FATAL EXCEPTION: MyHandlerThreadplaylistScheduleDao
12-17 20:07:31.796 6387 8776 E AndroidRuntime: Process: br.com.gomus.androidapp, PID: 6387
12-17 20:07:31.796 6387 8776 E AndroidRuntime: io.realm.exceptions.RealmError: Unrecoverable error. Too many open files in /Users/cm/Realm/realm-java-release/realm/realm-library/src/main/cpp/io_realm_internal_OsSharedRealm.cpp line 101
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.internal.OsSharedRealm.nativeGetSharedRealm(Native Method)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.internal.OsSharedRealm.<init>(OsSharedRealm.java:184)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.internal.OsSharedRealm.getInstance(OsSharedRealm.java:254)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.internal.OsSharedRealm.getInstance(OsSharedRealm.java:244)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.RealmCache.doCreateRealmOrGetFromCache(RealmCache.java:319)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:282)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at io.realm.Realm.getDefaultInstance(Realm.java:332)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at br.com.gomus.androidapp.data.local.database.LocalDatabaseImpl.findRealmObject(LocalDatabaseImpl.java:284)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at br.com.gomus.androidapp.data.local.dao.schedule.PlaylistScheduleDaoImpl$1.run(PlaylistScheduleDaoImpl.java:110)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:755)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at android.os.Looper.loop(Looper.java:154)
12-17 20:07:31.796 6387 8776 E AndroidRuntime: at android.os.HandlerThread.run(HandlerThread.java:61)
我在关闭领域实例时遇到了麻烦。任何帮助，将不胜感激。
谢谢。