The EntityManager is closed

Question

Doctrine ORM ORMException     The EntityManager is closed      After I get a DBAL exception when inserting data  EntityManager closes and I m not able to reconnect it    I tried like this but it didn t get a connection    this- gt em- gt close     this- gt set  doctrine orm entity manager   null    this- gt set  doctrine orm default entity manager   null    this- gt get  doctrine  - gt resetEntityManager     this- gt em    this- gt get  doctrine  - gt getEntityManager      Anyone an idea how to reconnect

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My solution   Before doing anything check   if    this- gt entityManager- gt isOpen           this- gt entityManager    this- gt entityManager- gt create           this- gt entityManager- gt getConnection             this- gt entityManager- gt getConfiguration              All entities will be saved  But it is handy for particular class or some cases  If you have some services with injected entitymanager  it still be closed

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I faced the same problem while testing the changes in Symfony 4 3 2  I lowered the log level to INFO  And ran the test again  And the logged showed this   console ERROR  Error thrown while running command  doctrine schema create   Message    Semantical Error  The annotation   ORM Id  in property App Entity Common   id was never imported  Did you maybe forget to add a  use  statement for this annotation     exception    object   Doctrine  Common  Annotations  AnnotationException code  0    Semantical Error  The annotation    ORM  Id   in property App  Entity  Common   id was never imported  Did you maybe forget to add a   use   statement for this annotation  at C   xampp  htdocs  dirty7s  vendor  doctrine  annotations  lib  Doctrine  Common  Annotations  AnnotationException php 54    command   doctrine schema create   message    Semantical Error  The annotation    ORM  Id   in property App  Entity  Common   id was never imported  Did you maybe forget to add a   use   statement for this annotation         This means that some error in the code causes the   Doctrine ORM ORMException  The EntityManager is closed    So it is a good idea to check the log

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This is a very tricky problem since  at least for Symfony 2 0 and Doctrine 2 1  it is not possible in any way to reopen the EntityManager after it closes   The only way I found to overcome this problem is to create your own DBAL Connection class  wrap the Doctrine one and provide exception handling  e g  retrying several times before popping the exception out to the EntityManager   It is a bit hacky and I m afraid it can cause some inconsistency in transactional environments  i e  I m not really sure of what happens if the failing query is in the middle of a transaction    An example configuration to go for this way is   doctrine    dbal      default connection  default     connections        default          driver     database driver          host       database host          user       database user          password   database password          charset    database charset          wrapper class  Your DBAL ReopeningConnectionWrapper   The class should start more or less like this   namespace Your DBAL   class ReopeningConnectionWrapper extends Doctrine DBAL Connection                A very annoying thing is that you have to override each method of Connection providing your exception-handling wrapper  Using closures can ease some pain there

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I had this issue  This how I fixed it   The connection seems to close while trying to flush or persist  Trying to reopen it is a bad choice because creates new issues  I tryed to understand why the connection was closed and found that I was doing too many modifications before the persist    persist   earlier solved the issue

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I had the same error using Symfony 5   Doctrine 2  One of my fields was named using a MySQL reserved word  order   causing a DBALException  When you want to use a reserved word  you have to escape it s name using back-ticks  In annotation form     ORM Column name   order    type  integer   nullable false

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You can reset your EM so     reset the EM and all aias  container    this- gt container   container- gt set  doctrine orm entity manager   null    container- gt set  doctrine orm default entity manager   null      get a fresh EM  em    this- gt getDoctrine  - gt getManager

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Symfony v4 1 6 Doctrine v2 9 0 Process inserting duplicates in a repository  Get access a registry in your repo          begin of repo               var RegistryInterface        protected  registry           public function   construct RegistryInterface  registry                 this- registry    registry          parent    construct  registry  YourEntity  class            Wrap risky code into transaction and reset manager in case of exception          in repo method      em    this- getEntityManager              em- beginTransaction        try            em- persist  yourEntityThatCanBeDuplicate            em- flush             em- commit               catch   Throwable  e              Rollback all nested transactions         while   em- getConnection  - getTransactionNestingLevel     0                 em- rollback                                 Reset the default em         if    em- isOpen                   this- registry- resetManager

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I faced the same problem  After looking at several places here is how I dealt with it     function in some model utility function someFunction  em       try            code which may throw exception and lead to closing of entity manager           catch Exception  e             handle exception         return false            return true       in controller assuming entity manager is in  this- gt em   result   someFunction  this- gt em   if   result        this- gt getDoctrine  - gt resetEntityManager         this- gt em    this- gt getDoctrine  - gt getManager        Hope this helps someone

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For what it s worth I found this issue was happening in a batch import command because of a try catch loop catching an SQL error  with em- gt flush    that I didn t do anything about  In my case it was because I was trying to insert a record with a non-nullable property left as null   Typically this would cause a critical exception to happen and the command or controller to halt  but I was just logging this problem instead and carrying on  The SQL error had caused the entity manager to close   Check your dev log file for any silly SQL errors like this as it could be your fault

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This is really old issue  but I just had similar problem  I was doing something like this       entity  entityOne    this- gt em- gt find Parent  class  1       do something on other entites  SomeEntityClass   this- gt em- gt persist  entity    this- gt em- gt flush     this- gt em- gt clear        and at end I was trying to save changes to first one by  this- gt em- gt persist  entityOne    this- gt em- gt flush     this- gt em- gt clear      Problem was that clear detach all entities including the first one and throw error The EntityManager is closed   In my case solution was to just do clear on distinct type of Entity and leave  entityOne still under EM    this- gt em- gt clear SomeEntityClass  class

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first need to reset current manager  em- gt resetManager       and then get new  em    this- gt getContainer  - gt get  doctrine       or in this way  depending of your environment   em    this- gt getDoctrine

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I found an interesting article about this problem  if    entityManager- gt isOpen         entityManager    entityManager- gt create       entityManager- gt getConnection     entityManager- gt getConfiguration         Doctrine 2 Exception EntityManager is closed

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this how you reset the enitityManager in Symfony3  It should reopen the em if it has been closed  In a Controller   em    this- gt getDoctrine  - gt resetEntityManager     In a service    if    this- gt em- gt isOpen               this- gt managerRegistry- gt resetManager  managername             this- gt em    this- gt managerRegistry- gt getManager  default                this- gt em- gt persist        Don t forget to inject the   doctrine  as a service argument in service yml  I m wondering  if this problem happens if different methodes concurrently tries to access the same entity at the same time

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Same problem  solved with a simple code refactoring  The problem is sometime present when a required field is null  before do anithing  try to refactor your code  A better workflow can solve the problem

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This is how I solved the Doctrine  The EntityManager is closed   issue  Basically each time there s an exception  i e  duplicate key  or not providing data for a mandatory column will cause Doctrine to close the Entity Manager  If you still want to interact with the database you have to reset the Entity Manger by calling the resetManager   method as mentioned by JGrinon   In my application I was running multiple RabbitMQ consumers that were all doing the same thing  checking if an entity was there in the database  if yes return it  if not create it and then return it  In the few milliseconds between checking if that entity already existed and creating it another consumer happened to do the same and created the missing entity making the other consumer incur in a duplicate key exception  race condition    This led to a software design problem  Basically what I was trying to do was creating all the entities in one transaction  This may feel natural to most but was definitely conceptually wrong in my case  Consider the following problem  I had to store a football Match entity which had these dependencies    a group  e g  Group A  Group B     a round  e g  Semi-finals     a venue  i e  stadium where the match is taking place  a match status  e g  half time  full time  the two teams playing the match the match itself   Now  why the venue creation should be in the same transaction as the match  It could be that I ve just received a new venue that it s not in my database so I have to create it first  But it could also be that that venue may host another match so another consumer will probably try to create it as well at the same time  So what I had to do was create all the dependencies first in separate transactions making sure I was resetting the entity manager in a duplicate key exception  I d say that all the entities in there beside the match could be defined as  shared  because they could potentially be part of other transactions in other consumers  Something that is not  shared  in there is the match itself that won t likely be created by two consumers at the same time  So in the last transaction I expect to see just the match and the relation between the two teams and the match   All of this also led to another issue  If you reset the Entity Manager  all the objects that you ve retrieved before resetting are for Doctrine totally new  So Doctrine won t try to run an UPDATE on them but an INSERT  So make sure you create all your dependencies in logically correct transactions and then retrieve all your objects back from the database before setting them to the target entity  Consider the following code as an example    group    this- gt createGroupIfDoesNotExist  groupData     match- gt setGroup  group      this is NOT OK    venue    this- gt createVenueIfDoesNotExist  venueData     round    this- gt createRoundIfDoesNotExist  roundData           If the venue creation generates a duplicate key exception    we are forced to reset the entity manager in order to proceed    with the round creation and so we ll loose the group reference     Meaning that Doctrine will try to persist the group as new even    if it s already there in the database        So this is how I think it should be done    group    this- gt createGroupIfDoesNotExist  groupData      first transaction  reset if duplicated  venue    this- gt createVenueIfDoesNotExist  venueData      second transaction  reset if duplicated  round    this- gt createRoundIfDoesNotExist  roundData      third transaction  reset if duplicated     we fetch all the entities back directly from the database  group    this- gt getGroup  groupData    venue    this- gt getVenue  venueData    round    this- gt getGroup  roundData       we finally set them now that no exceptions are going to happen  match- gt setGroup  group    match- gt setVenue  venue    match- gt setRound  round       match and teams relation     matchTeamHome   new MatchTeam     matchTeamHome- gt setMatch  match    matchTeamHome- gt setTeam  teamHome     matchTeamAway   new MatchTeam     matchTeamAway- gt setMatch  match    matchTeamAway- gt setTeam  teamAway     match- gt addMatchTeam  matchTeamHome    match- gt addMatchTeam  matchTeamAway       last transaction   em- gt persist  match    em- gt persist  matchTeamHome    em- gt persist  matchTeamAway    em- gt flush      I hope it helps

User · Answer

In controller   Exception closes the Entity Manager  This makes troubles for bulk insert   To continue  need to redefine it           var   Doctrine ORM EntityManager     em    this- gt getDoctrine  - gt getManager     foreach  to insert AS  data        if   em- gt isOpen                   this- gt getDoctrine  - gt resetManager             em    this- gt getDoctrine  - gt getManager              entity   new  Entity       entity- gt setUniqueNumber  data  number        em- gt persist  entity      try          em- gt flush         counter          catch  Doctrine DBAL DBALException  e          if  e- gt getPrevious  - gt getCode       23000                              if its not the error code for a duplicate key          value then rethrow the exception                throw  e            else              duplication

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Symfony 2 0    em    this- gt getDoctrine  - gt resetEntityManager      Symfony 2 1     em    this- gt getDoctrine  - gt resetManager

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In Symfony 4 2  you have to use the package   composer require symfony proxy-manager-bridge   otherwiese you get the exception   Resetting a non-lazy manager service is not supported  Declare the  doctrine orm default entity manager  service as lazy      Than you can reset the entityManager like this   services yaml   App Foo      -   doctrine orm entity manager      -   doctrine    Foo php   use Doctrine Bundle DoctrineBundle Registry  use Doctrine DBAL DBALException  use Doctrine ORM EntityManagerInterface     try        this- gt entityManager- gt persist  entity        this- gt entityManager- gt flush      catch  DBALException  e        if    this- gt entityManager- gt isOpen               this- gt entityManager    this- gt doctrine- gt resetManager

[symfony] The EntityManager is closed

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