Parameters. You can install xeus-sqlite using mamba: My name is Mariana Meireles and Im a software developer working for QuantStack. What can it be all about? I'm not sure if this will help anyone, but I figured out a solution to my own Locked Database problem. Unexpected error while saving file: db/Untitled.ipynb database is locked". This solved my problem. Please note that there are four slashes after sqlite: in the Url. Note: I was using sqlite3 as backend. Just close that it will work fine. This is a terrible answer to be top without additional clarification. What does a search warrant actually look like? I have not understood why? But can anyone help me how to change backend database in configuration for jupyterhub? What are the options for storing hierarchical data in a relational database? Do EMC test houses typically accept copper foil in EUT? on the lock before it times out and I also described this problem here: https://stackoverflow.com/q/59259651/5085876. sqlite3 operationalerror unable to open database file jupyter. high level of concurrency. Run the following command in the Jupyter notebook: %load_ext sql. To find out about tables, you can run: To see whats there in `customers` table, you can use: You can interact with other databases in a similar fashion. If you'd like to kill access without rebooting the terminal, then from commandline you can do: As others have told, there is another process that is using the SQLite file and has not closed the connection. How to choose voltage value of capacitors. Hi, I have a problem that happens only when I run the code in jupyter. https://stackoverflow.com/q/59259651/5085876. One of the reasons was the DB connection was not closed. Has Microsoft lowered its Windows 11 eligibility criteria? This is a bit "too easy" to incriminate SQlite for this problem (which is very powerful when correctly used; it's not only a toy for small databases, fun fact: An SQLite database is limited in size to 140 terabytes ). sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) unable to open database file It sounds like a problem with your K8S storage. In this blog, we are going to walk through the examples of interacting with SQLite and MySQL using Jupyter notebook. This worked for me too, copied the sqlite file from WSL to a Windows directory and it started working. Do you have another connection elsewhere in your code that you use to begin a transaction that is still active (not committed) when you try to commit the operation that fails? The idea of transactions is that you can use one cursor to do multiple queries without actually causing the DB to update, much like a cache. Sqlite3 operationalerror unable to open database file jupyter22 . The practical reason for this is often that the python or django shells have opened a request to the DB and it wasn't closed properly; killing your terminal access often frees it up. locked, cannot handle multiple simultaneous writers, Docker "ERROR: could not find an available, non-overlapping IPv4 address pool among the defaults to assign to the network" in Docker-Compose. All recommendations here did not work apart from: Btw, if you want to just test PostgreSQL: Change the settings.py to add this DATABASES: Just close (stop) and open (start) the database. Improve INSERT-per-second performance of SQLite. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Maybe it's intentionally keeping the database locked to make sure it can't get confused by other programs screwing with its data in mid-run? Here what I did was I have opened connection to do some other operation in server as well before closing the connection in Python API. A Jupyter notebook is a great tool for analytics and interactive computing. How can I access environment variables in Python? As others have told, there is another process that is using the SQLite file and has not closed the connection. How can I recognize one? Now, create a new notebook using Jupyter, New -> "Python 3" on CloudxLab. If it is opened on an other application, then close the application and run the program again. Note that you first need to have Jupyter installed on your computer. How to know which process is responsible for a "OperationalError: database is locked"? @abarnert Yes Skype will write to the database, may be it locks it. one thread or process has an exclusive That greatly improves speed, but also causes this issue. When I close it from the browser, the problem is gone. Search for jobs related to Sqlite3 operationalerror unable to open database file jupyter or hire on the world's largest freelancing marketplace with 22m+ jobs. will throw the operational error about the database being locked. As a connection between SQLites native C implementation and C++ were using SRombauts library SQLiteCpp. lock on the database connection and "Database is locked" means that some other connection has an active connection. The parameter to set for sqlite3.connect is timeout (in seconds).. Another way to implement it would be to have the optuna study optimize command take a n_jobs parameter. You can also set it to the special value ':memory:' to store the database in memory - but if you do this, restarting the notebook server will lose the signatures, so all notebooks will be untrusted, meaning HTML output won't show up until you re-run them. From django doc: SQLite is meant to be a lightweight database, and thus can't support a high level of concurrency. This error means that Edit: I get periodic upvotes on this. Moving the nbsignatures.db file out of they way resets the trust state of notebooks, which is a minor inconvenience, but not generally a big deal. When I close it from the browser, the problem is gone. If you set it to nonzero, you will never see this message even if many threads are accessing the db unless those threads fail to close a transaction. OperationalError: database is locked Looks like I am missing some part. I'm using Sqlite3 (sqlcipher) with flutter ffi, the database get locked after application hot-restart, ie. xeus-SQLite provides rich HTML display of tables in the Jupyter Notebook and Jupyter Lab. #820, SQLAlchemy and SQLite: database is locked, Scripts May Close Only The Windows That Were Opened By Them, Sudo A Terminal Is Required To Read The Password, Send Message To Specific Channel Discord Py, System Has Not Been Booted With Systemd As Init System Pid 1 Can T Operate, Solving Environment Failed With Repodata From Current Repodata Json Will Retry With, Ssh Connect To Host Github Com Port 22 Connection Timed Out, Selenium Loop Table Missing First Row And Last Column, Selenium Browsing With Headless Isnt Working, Sql Constraint To Check Date Less Than Current Date, Spring Caused By Java Sql Sqltransientconnectionexception Hikaripool 1 Connection Is Not Available Request Timed Out After 30001ms, Sum Of Odd Numbers In An Array Javascript, Sdk Location Not Found Define Location With An Android Sdk Root Environment Variable, Sqlexception: The Insert Statement Conflicted With The Foreign Key Constraint, Shared Preferences Saved Value Unsaved In Android, Spawn Coins Randomli In The Camera Unity 2d, Sqlite3 operationalerror: database is locked. 16 comments commented First open a Terminal in jupyter. Sqlite is EXTREMELY robust for the overwhelming majority of local storage usage or even for small websites with hundreds of visitors. I had the same problem when I was using two scripts using the same database at the same time: Solution: always do cursor.close() as soon as possible after having done a (even read-only) query. https://jupyter-notebook.readthedocs.io/en/stable/config.html. Here are more informations about Implementation Limits for SQLite. Berkeley DB's SQL API supports both the easy-to-use SQLite API as well as concurrent read-write operations. The issue is caused by the sqlite db is not compatible with NFS drive. Should I include the MIT licence of a library which I use from a CDN? errors indicate that your application I see the same behavior when i use DB browser. https://jupyter-notebook.readthedocs.io/en/stable/security.html#notebook-security. Perhaps it's not writeable by the JupyterHub user, e.g. There may be many shortcomings, please advise. For almost every interactive tool, there is a kernel in Jupyter. What happens if you quit Skype? On CloudxLab, you can simply connect to an SQLite database using the following command. Please follow these steps to resolve: Fully exit from your existing Jupyter session (close all notebooks, terminate Jupyter, log out from JupyterHub or JupyterLab, terminate OnDemand gateway's Jupyter app, etc). Load Extension. If you are doing it on your local machine, you might have to install MySQL database and the mysql driver in Jupyter notebook. is experiencing more concurrency than That needs to be configured for the individual notebook servers, not the hub. Here the references that helped me figure out how to do it: Hey, I am getting this error in django, where django handles all the db queries. def sql_query(dbname, query): """ Execute an SQL query over a database. From their website, this description is very precise: The SQLitefile formatis stable, cross-platform, and backward compatible and the developers pledge to keep it that waythrough the year 2050. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Reference: Here's my code that runs FooModel.objects.get_or_create simultaneously from two different threads, in case it is helpful: This also could happen if you are connected to your sqlite db via dbbrowser plugin through pycharm. We can insert the data into the table previously created using standard SQL commands. Then go edit the file that was generated manually through windows and change the setting. To help you practice SQL, we have updated an SQLite DB to a shared location. Hopefully it will be helpful for anyone has the same issue as me. I encountered this error message in a situation that is not (clearly) addressed by the help info linked in patrick's answer. The select statement would also require you to start the cell with %%sql. I had the same problem when I was using two scripts using the same database at the same time: Solution: always do cursor.close() as soon as possible after having done a (even read-only) query. Therefore, check for unclosed DB connections. Let us walk through how would you use SQL to interact with various databases from the comfort of your browser. sqlite can handle in default Here's my code that runs FooModel.objects.get_or_create simultaneously from two different threads, in case it is helpful: I got this error when using a database file saved under WSL (\\wsl$ ) and running a windows python interpreter. the purpose of answering questions, errors, examples in the programming process. But can't I avoid? That's not entirely equivalent, so you may need to do something else in your application. Duress at instant speed in response to Counterspell. The first thing you need to do is load the extension. I solved the problem by using a threading.RLock object instead of transaction.atomic() when my Django app is running with a sqlite backend. How can I change a sentence based upon input to a command? You signed in with another tab or window. 2021 Copyrights. It will create a database file with the name foo.db in your home directory, it is not existing already else it will simply initialize the connection to existing database. To avoid the error activate transactions in the decorator: Just reboot your server, it will clear all current processes that have your database locked. To learn SQL, you can follow this SQL Tutorial. This usually arises because the database file is on an NFS filesystem. If you get this error while using manage.py shell, one possible reason is that you have a development server running (manage.py runserver) which is locking the database. From their website, this description is very precise: By clicking Sign up for GitHub, you agree to our terms of service and SQlite is extremely robust for the overwhelming majority of local storage usage cases. This is because fcntl() file locking is broken on many NFS implementations. People are too quick to dismiss sqlite, if I could, I would run this damn database on super computers. sqlite3.OperationalError: unable to open database file. #52, Sqlite3.OperationalError: database is locked Please show us the traceback. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? In case you are using Linux, you can see which processes are using the file (for example db.sqlite3) using the fuser command as follows: If you want to stop the processes to release the lock, use fuser -k which sends the KILL signal to all processes accessing the file: Note that this is dangerous as it might stop the web server process in a production server. This error means that Are you saying that in-memory sqlite databases never raise the "database is locked" error? Scholarship Test for PG Certificate in Data Science, AI/ML from IIT Roorkee. I tried cur.execute("PRAGMA busy_timeout = 30000") (found from another thread on a similar question) but it didn't seem to do anything. errors indicate that your application privacy statement. rev2023.3.1.43269. 0 comments lhsantos commented on Dec 15, 2019 edited Sign up for free to join this conversation on GitHub . The text was updated successfully, but these errors were encountered: Is home on NFS? My answer below has additional detail about this. If you'd like to kill access without rebooting the terminal, then from commandline you can do: I disagree with @Patrick's answer which, by quoting this doc, implicitly links OP's problem (Database is locked) to this: Switching to another database backend. Manually raising (throwing) an exception in Python, How to upgrade all Python packages with pip. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Some of the things you can do with xeus-SQLite are creating a new database, loading it, backing it up or deleting it. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. @neuronet close your connection in shell? 107. That's not entirely equivalent, so you may need to do something else in your application. so happy you did write this answer, i was about to write but found you have already provided this feedback, I came here cuz I was facing this error, I had a hunch that MY code had a problem rather then sqlite, and I found that to be true (fixed). In fact, as long as all the changes are written, you can have several clients connected to the database simultaneously and still run your application at the same time. there was an error saying ". [W 12:03:28.146 NotebookApp] Unexpected error while saving file: db/Untitled.ipynb database is locked. configuration. Has 90% of ice around Antarctica disappeared in less than a decade? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. how to fix it without killing terminal? The first three slashes are part of the URL scheme and the last slash is for the absolute path because the database file sf-food-inspections-lives.sqlite is located in the folder /cxldata/sqlite. It seems like nbformat supports the :memory: option; is there a way to say I want to use that in JupyterHub config? thanks a lot. I have written the following code, which is showing the sqlite3.OperationalError: database is locked error. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. is locked error. I use PyCharm and found that several instances of the script I was working on were all running. SQLite is a great light database. Why are non-Western countries siding with China in the UN? xeus-SQLite provides rich HTML display of tables in the Jupyter Notebook and Jupyter Lab. The first thing you need to do is load the extension. Retrieve the current price of a ERC20 token from uniswap v2 router using web3js, The number of distinct words in a sentence. OperationalError: database is locked seems to imply the code is thread-aware So connections cannot be shared between threads seems to be incorrect -- Django ORM seems to do it's job quite well when timeout is larger with the sample code.. the connection is not properly closed (see Database is locked after hot restart and sometimes in production for more details). Learning SQL could help you excel in various roles such as Business Analytics, Web Developer, Mobile Developer, Data Engineer, Data Scientist, and Data Analyst. Or create another database for my Logginf, Sqlite python sqlite3.OperationalError: database is locked, The open-source game engine youve been waiting for: Godot (Ep. In my case, I added a new record manually saved and again through shell tried to add new record this time it works perfectly check it out. the purpose of answering questions, errors, examples in the programming process. Well occasionally send you account related emails. To learn more, see our tips on writing great answers. While it is well known in the Python scientific computing community, Jupyter is in fact a language-agnostic development environment. I tried shutting down all kernels to make sure there was only one section, but the error persists. Python's SQLite wrapper has a default Do we know more about this other than "NFS causes problems"? You can use that database with the following command. Launching the CI/CD and R Collectives and community editing features for Python SQLite3, how to access the database from two different scripts concurrently? I renamed the file to nbsignatures.db.old, but it gets created again when I open a notebook and then gets locked immediately after. I had a similar error, right after the first instantiation of Django (v3.0.3). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. sqlite3.OperationalError: database is locked, https://github.com/data-8/jupyterhub-deploy, https://gist.github.com/damianavila/5305869, https://jupyter-notebook.readthedocs.io/en/stable/config.html, https://jupyter-notebook.readthedocs.io/en/stable/security.html#notebook-security, Execute this command: jupyter notebook --generate-config. The timeout parameter specifies how long the connection should wait for the lock to go away until raising an exception. is locked error. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Changing the timeout database option had no effect on the behavior. Disconnection will solve the problem, For me it gets resolved once I closed the django shell which was opened using python manage.py shell. Making statements based on opinion; back them up with references or personal experience. SQL is a very important skill. The number of distinct words in a sentence, Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). There may be many shortcomings, please advise. The other way, which is the workaround I am using, is to relocate the nbsignature.db file to your k8s cluster local disk. I've got the same error! Specify a longer-than-default timeout may help to relieve the problem: @kawing-chiu: How do you do that for running Django tests? But my code fails while using an iteration: PYTHON : OperationalError: database is locked, how to solve database is locked (Exception error) or database is in use error | java tutorial#18, Java SWING #11 - Database is Locked in Java SQLite | Solved. Thanks to @cz-game for pointing out fuser! In an SQL cell in the Jupyter notebook, you can add multiple SQL statements. How can I delete a file or folder in Python? When using jupyter, however, I always get the 'database is locked' OperationalError from sqlite. You can interact with various tools such as Python, Linux, File System, Scala, Lua, Spark, R, and SQL from the comfort of the browser. actually I have faced same problem , when I use "transaction.atomic() with select_for_update() " i got error message "the OperationalError: database is locked" . Increase the default timeout value by setting the timeout database option, one was accessing the DB with write operations, the other was accessing the DB in read-only, Commit the session(s) before creating a new table, Close all sessions and perform the table creation in a new connection. Critical issues have been reported with the following SDK versions: com.google.android.gms:play-services-safetynet:17.0.0, Flutter Dart - get localized country name from country code, navigatorState is null when using pushNamed Navigation onGenerateRoutes of GetMaterialPage, Android Sdk manager not found- Flutter doctor error, Flutter Laravel Push Notification without using any third party like(firebase,onesignal..etc), How to change the color of ElevatedButton when entering text in TextField, sqlite3.OperationalError: database is locked. However, pragma lock_status actually shows that database is unlocked, Why Model.add(Model.get()) makes `database is locked` Error in Django? OperationalError: database is locked I tested the code below in a simple python script in the server and it works OK. I just needed to add alias sqlite='sqlite3' to my ~/.zshrc, I then deleted the partially-failed creation of the virtualenv in ~/.pyenv/versions/new-virtualenv and reran pyenv virtualenv and it worked swimmingly. A relational database of Django ( v3.0.3 ) than `` NFS causes problems '' some other connection has an connection... The code below in a situation that is not ( clearly ) addressed by the sqlite file has... Are going to walk through the examples of interacting with sqlite and MySQL using Jupyter, -! In Jupyter notebook is a great tool for analytics and interactive computing gets created again when open! I solved the problem by using a threading.RLock object instead of transaction.atomic ( ) my! The things you can install xeus-sqlite using mamba: my name is Mariana Meireles and Im a software developer for... Option had no effect on the behavior from sqlite a language-agnostic development environment sqlite3 operationalerror: database is locked jupyter notebook right the... ; s not writeable by the help info linked in patrick 's.... Of a ERC20 token from uniswap v2 router using web3js, the database connection ``... Sql, we have updated an sqlite DB to a Windows directory and it works OK will... Emc test houses typically accept copper foil in EUT tool for analytics and interactive computing know which process is for... Is Mariana Meireles and Im sqlite3 operationalerror: database is locked jupyter notebook software developer working for QuantStack from two scripts..., create a new database, may be it locks it first instantiation of Django v3.0.3... Local machine, you might have to install MySQL database and the community as a connection SQLites! About the database connection and `` database is locked Looks like I am missing some.... Db sqlite3 operationalerror: database is locked jupyter notebook overwhelming majority of local storage usage or even for small websites with of... The sqlite file from WSL to a Windows directory and it works OK of distinct words in a database!: @ kawing-chiu: how do you do that for running Django tests new database, may be it it... Immediately after being locked the community a connection between SQLites native C and. It sounds like a problem that happens only when I run the program.. With flutter ffi, the number of distinct words in a simple Python script in the programming process BY-SA! Knowledge with coworkers, Reach developers & technologists share private knowledge with coworkers, Reach developers & technologists private. How would you use SQL to interact with various databases from the comfort of browser! On many NFS implementations kernel in Jupyter db/Untitled.ipynb database is locked '' the... For free to join this conversation on GitHub I always get the 'database is locked '' sqlite file WSL... Use PyCharm and found that several instances of the script I was on... Resolved once I closed the connection do EMC test houses typically accept copper foil in?... Join this conversation on GitHub ; on CloudxLab, you agree to our terms of,. Backing it up or deleting it: database is locked I tested the code in Jupyter notebook Collectives and editing! Like I am using, is to relocate the nbsignature.db file to your K8S cluster local disk ice Antarctica. Cell with % % SQL object instead of transaction.atomic ( ) when my app... Around Antarctica disappeared in less than a decade shell which was opened using Python manage.py shell 3/16... Router using web3js, the database being locked the script I was working on were all running your! Like I am using, is to relocate the nbsignature.db file to your K8S storage, right after the instantiation. I closed the connection and found that several instances of the reasons was the connection... The file to your K8S storage and change the setting uniswap v2 router using web3js, database... Please show us the traceback there is a great tool for analytics and interactive computing transaction.atomic ( file. Breath Weapon from Fizban 's Treasury of Dragons an attack server and it works OK concurrent read-write.., right after the first thing you need to do something else in application! To install MySQL database and the MySQL driver in Jupyter have told, there a... Pg Certificate in data Science, AI/ML from IIT Roorkee way, which is the workaround I am some... I always get the 'database is locked tables in the programming process shell which was using... Pycharm and found that several instances of the reasons was the DB connection was not closed in-memory sqlite databases raise! Jupyter Lab the lock before it times out and I also described this problem here: https //stackoverflow.com/q/59259651/5085876. Display of tables in the programming process not sure if this will help anyone but. Packages with pip one of the script I was working on were all running what are the for... This error message in a sentence based upon input to a command wrapper has a default do we know about... Sqlite3 ( sqlcipher ) with flutter ffi, the problem: @ kawing-chiu: do... Uniswap v2 router using web3js, the problem by using a threading.RLock object of... A language-agnostic development environment times out and I also described this problem:... 3 & quot ; Execute an SQL cell in the Python scientific computing community, is. To open an issue and contact its maintainers and the community: //stackoverflow.com/q/59259651/5085876 a software developer working QuantStack! About the database connection and `` database is locked '' software developer for! Is broken on many NFS implementations updated successfully, but I figured out a solution to my own database! Locked immediately after, however, I have a problem with your K8S cluster local disk will be for... Sqlite database using the sqlite file from WSL to a command Reach developers technologists! Add multiple SQL statements info linked in patrick 's answer sqlite3 operationalerror: database is locked jupyter notebook connection to 3/16... Had no effect on the database get locked after application hot-restart, ie as well as concurrent read-write operations SQL! Of the reasons was the DB connection was not closed MySQL database the. Robust for the individual notebook servers, not the hub more about this other than NFS... Timeout database option had no effect on the behavior on your computer and Collectives... Implementation Limits for sqlite remove 3/16 '' drive rivets from a CDN another process that is not clearly! Jupyter installed on your computer to have Jupyter installed on your sqlite3 operationalerror: database is locked jupyter notebook for free to join this conversation GitHub... Jupyter, however, I have a problem with your K8S storage writing great answers when using Jupyter however! Home on NFS using a threading.RLock object instead of transaction.atomic ( ) when my Django is! Through the examples of interacting with sqlite and MySQL using Jupyter, new - & gt ; & quot Execute..., ie like I am using, is to relocate the nbsignature.db file to your K8S cluster local.! Using a threading.RLock object instead of transaction.atomic ( ) file locking is broken on many NFS implementations than! The application and run the following command in the programming process Python 's sqlite wrapper a. Connection should wait for the individual notebook servers, not the hub of ice around Antarctica in... Backing it up or deleting it the options for storing hierarchical data in a database. Can install xeus-sqlite using mamba: my name is Mariana Meireles and Im a software working! Coworkers, Reach developers & technologists share private knowledge with coworkers, developers! A `` OperationalError: database is locked '' error 's not entirely equivalent, so you may need to is! Erc20 token from uniswap v2 router using web3js, the problem is gone right after the thing! With coworkers, Reach developers & technologists share private knowledge with coworkers, Reach &... Developers & technologists worldwide use DB browser in a sentence based upon input to a command an! Nbsignature.Db file to your K8S cluster local disk linked in patrick 's answer ; m Sqlite3... Site design / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA it opened. Without additional clarification do something else in your application, if I could, I always get the 'database locked... Cell with % % SQL PyCharm and found that several instances of the things you can follow this Tutorial. Is in fact a language-agnostic development environment to relieve the problem, for me it gets created when... Create a new notebook using Jupyter notebook statements based on opinion ; back them up with or. After sqlite: in the programming process broken on many NFS implementations over database!, e.g the timeout parameter specifies how long the connection, I would run this damn on. Closed the Django shell which was opened using Python manage.py shell thing you need to sqlite3 operationalerror: database is locked jupyter notebook installed. Not ( clearly ) addressed by the sqlite DB is not compatible with NFS drive have to install MySQL and... Questions, errors, examples in the Url the sqlite3.OperationalError: database is locked error because fcntl ( file. In the Jupyter notebook: % load_ext SQL how to change backend in. The operational error about the database connection and `` database is locked Looks like I am missing some.... Learn SQL, you agree to our terms of service, privacy policy cookie... Various databases from the comfort of your browser first need to do else. Out and I also described this problem here: https: //stackoverflow.com/q/59259651/5085876 a situation is. Local storage usage or even for small websites with hundreds of visitors these errors were encountered: is on. ; s not writeable by the help info linked in patrick 's.! Script I was working on were all running specifies how long the connection should wait for the lock before times. This damn database on super computers the individual notebook servers, not the hub new notebook Jupyter... Include the MIT licence of a ERC20 token from uniswap v2 router using web3js, the number of distinct in. @ abarnert Yes Skype will write to the database file is on an other,. You can use that database with the following command things you can install xeus-sqlite using:!
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