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C# 同时向2个表插入API请求时发生数据库死锁

c# sql-server asp.net-core .net-core entity-framework-core

C# 同时向2个表插入API请求时发生数据库死锁,c#,sql-server,asp.net-core,.net-core,entity-framework-core,C#,Sql Server,Asp.net Core,.net Core,Entity Framework Core,所以我的api中有一个端点，它接受带有数据的文件。对于每个文件，我提取数据并将其保存到Products表中，同时保存添加到differentSavedFiles表中的文件名和日期。每个产品都有fileId，以便我们知道它来自哪个文件 在控制器的端点内，基本上有： await Handler.SaveFromFile(fileStream, fileName) 处理程序在Startup.cs中注册为services.addScope（）并注入控制器 方法是这样构建的： public async

所以我的api中有一个端点，它接受带有数据的文件。对于每个文件，我提取数据并将其保存到
Products
表中，同时保存添加到different
SavedFiles
表中的文件名和日期。每个产品都有
fileId
，以便我们知道它来自哪个文件

在控制器的端点内，基本上有：

await Handler.SaveFromFile(fileStream, fileName)
处理程序在Startup.cs中注册为
services.addScope（）并注入控制器

方法是这样构建的：


public async Task SaveFromFile(Stream fileStream, string fileName)
{
     List<Products> products = Extract(fileStream);
     var file = new SavedFile 
     {
          FileName = fileName,
          DateAdded = DateTime.UtcNow
     };

     foreach (var product in products)
     {
          product.SavedFile = file;
     }

     DbContext.AddRange(products);
     await DbContext.SaveChangesAsync();
}


我尝试设置
builder.EnableRetryOnFailure（5，TimeSpan.FromSeconds（10），null）但我得到了另一个例外：


System.InvalidOperationException: An exception has been raised that is likely due to a transient failure. Consider enabling transient error resiliency by adding 'EnableRetryOnFailure()' to the 'UseSqlServer' call.
---> Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details.
---> Microsoft.Data.SqlClient.SqlException (0x80131904): Transaction (Process ID 55) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.



Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details.
 ---> Microsoft.Data.SqlClient.SqlException (0x80131904): The MERGE statement conflicted with the FOREIGN KEY constraint "FK_Products_SavedFiles_SavedFileId". The conflict occurred in database "TestDB", table "dbo.SavedFiles", column 'Id'.


如何避免这样的冲突？
实际上，对于具有不同数据的文件，我也有不同的端点。它们将数据保存到不同的表中，但有关文件的信息与其他端点保存到同一个表中，如果有对两个不同端点的请求，我会得到相同的异常（可能是因为它们都使用SavedFiles表），因此我需要跨所有端点工作的解决方案

@编辑：


[HttpPost("Upload")]
public async Task<ActionResult> Upload([FromForm]IFormFile file)
{
    if (file == null || file.Length == 0)
    {
        return BadRequest();
    }

    using var fileStream = file.OpenReadStream();

    await Handler.SaveFromFile(fileStream, file.FileName);

    return Ok();
}



    services.AddDbContext<TestDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"), builder => 
    {
        builder.EnableRetryOnFailure(5, TimeSpan.FromSeconds(10), null);
    }));



<deadlock>
 <victim-list>
  <victimProcess id="process2026c423088" />
 </victim-list>
 <process-list>
  <process id="process2026c423088" taskpriority="0" logused="94536" waitresource="KEY: 7:72057594043236352 (5d937923d5a3)" waittime="3199" ownerId="6294993" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:12.940" XDES="0x2026ed30490" lockMode="S" schedulerid="3" kpid="21092" status="suspended" spid="66" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:14.487" lastbatchcompleted="2020-08-26T15:23:14.227" lastattention="1900-01-01T00:00:00.227" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294993" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73724" stmtend="110198" sqlhandle="0x02000000b605be0cf972a469745510a34ff7a63c7c992a5c0000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p6 decimal(1,0),@p7 bigint,@p8 nvarchar(4000),@p9 decimal(2,2),@p10 nvarchar(4000),@p11 decimal(3,3),@p12 int,@p13 tinyint,@p14 decimal(1,0),@p15 bigint,@p16 nvarchar(4000),@p17 decimal(4,4),@p18 nvarchar(4000),@p19 decimal(5,5),@p20 int,@p21 tinyint,@p22 decimal(1,0),@p23 bigint,@p24 nvarchar(4000),@p25 decimal(5,4),@p26 nvarchar(4000),@p27 decimal(17,15),@p28 int,@p29 tinyint,@p30 decimal(1,0),@p31 bigint,@p32 nvarchar(4000),@p33 decimal(5,4),@p34 nvarchar(4000),@p35 decimal(17,15),@p36 int,@p37 tinyint,@p38 decimal(1,0),@p39 bigint,@p40 nvarchar(4000),@p41 decimal(5,4),@p42 nvarchar(4000),@p43 decimal(17,15),@p44 int,@p45 tinyint,@p46 decimal(1,0),@p47 bigint,@p48 nvarchar(4000),@p49 decimal(5,4),@p50 nvarchar(4000),@p51 decimal(17,15),@p52 int,@p53 tinyint,@p54 decimal(1,0),@p55 bigint,@p56 nvarchar(4000),@p57 decimal(5,4),@p58 nvarchar(4000),@p59 decimal(17,15),@p60 int,@p61 tinyint,@p62 decimal(1,0),@p63 bigint,@p64 nvarchar(4000),@p65 decimal(5,4),@p66 nvarchar(4000),@p67 decimal(17,15),@p68 int,@p6   </inputbuf>
  </process>
  <process id="process202715a5848" taskpriority="0" logused="855980" waitresource="KEY: 7:72057594043236352 (39c9529c1a80)" waittime="3841" ownerId="6294746" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:08.467" XDES="0x20269474490" lockMode="S" schedulerid="2" kpid="29744" status="suspended" spid="67" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:13.770" lastbatchcompleted="2020-08-26T15:23:13.757" lastattention="1900-01-01T00:00:00.757" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294746" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73728" stmtend="110166" sqlhandle="0x0200000045e14010c29c7110c8ba274a0810d01d7814e9f90000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p0 decimal(1,0),@p1 bigint,@p2 nvarchar(4000),@p3 decimal(2,2),@p4 nvarchar(4000),@p5 decimal(3,3),@p6 int,@p7 tinyint,@p8 decimal(1,0),@p9 bigint,@p10 nvarchar(4000),@p11 decimal(3,2),@p12 nvarchar(4000),@p13 decimal(5,3),@p14 int,@p15 tinyint,@p16 decimal(1,0),@p17 bigint,@p18 nvarchar(4000),@p19 decimal(2,2),@p20 nvarchar(4000),@p21 decimal(4,3),@p22 int,@p23 tinyint,@p24 decimal(1,0),@p25 bigint,@p26 nvarchar(4000),@p27 decimal(3,2),@p28 nvarchar(4000),@p29 decimal(4,3),@p30 int,@p31 tinyint,@p32 decimal(1,0),@p33 bigint,@p34 nvarchar(4000),@p35 decimal(2,2),@p36 nvarchar(4000),@p37 decimal(17,17),@p38 int,@p39 tinyint,@p40 decimal(1,0),@p41 bigint,@p42 nvarchar(4000),@p43 decimal(2,2),@p44 nvarchar(4000),@p45 decimal(16,16),@p46 int,@p47 tinyint,@p48 decimal(1,0),@p49 bigint,@p50 nvarchar(4000),@p51 decimal(3,2),@p52 nvarchar(4000),@p53 decimal(17,15),@p54 int,@p55 tinyint,@p56 decimal(1,0),@p57 bigint,@p58 nvarchar(4000),@p59 decimal(3,2),@p60 nvarchar(4000),@p61 decimal(16,15),@p62 int,@p63 tinyint,   </inputbuf>
  </process>
 </process-list>
 <resource-list>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20238cb3d80" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process202715a5848" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process2026c423088" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20279061100" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process2026c423088" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process202715a5848" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
 </resource-list>
</deadlock>



@大师斯特隆要求整个控制器的行动，并重试配置

控制器操作：


[HttpPost("Upload")]
public async Task<ActionResult> Upload([FromForm]IFormFile file)
{
    if (file == null || file.Length == 0)
    {
        return BadRequest();
    }

    using var fileStream = file.OpenReadStream();

    await Handler.SaveFromFile(fileStream, file.FileName);

    return Ok();
}



    services.AddDbContext<TestDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"), builder => 
    {
        builder.EnableRetryOnFailure(5, TimeSpan.FromSeconds(10), null);
    }));



<deadlock>
 <victim-list>
  <victimProcess id="process2026c423088" />
 </victim-list>
 <process-list>
  <process id="process2026c423088" taskpriority="0" logused="94536" waitresource="KEY: 7:72057594043236352 (5d937923d5a3)" waittime="3199" ownerId="6294993" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:12.940" XDES="0x2026ed30490" lockMode="S" schedulerid="3" kpid="21092" status="suspended" spid="66" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:14.487" lastbatchcompleted="2020-08-26T15:23:14.227" lastattention="1900-01-01T00:00:00.227" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294993" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73724" stmtend="110198" sqlhandle="0x02000000b605be0cf972a469745510a34ff7a63c7c992a5c0000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p6 decimal(1,0),@p7 bigint,@p8 nvarchar(4000),@p9 decimal(2,2),@p10 nvarchar(4000),@p11 decimal(3,3),@p12 int,@p13 tinyint,@p14 decimal(1,0),@p15 bigint,@p16 nvarchar(4000),@p17 decimal(4,4),@p18 nvarchar(4000),@p19 decimal(5,5),@p20 int,@p21 tinyint,@p22 decimal(1,0),@p23 bigint,@p24 nvarchar(4000),@p25 decimal(5,4),@p26 nvarchar(4000),@p27 decimal(17,15),@p28 int,@p29 tinyint,@p30 decimal(1,0),@p31 bigint,@p32 nvarchar(4000),@p33 decimal(5,4),@p34 nvarchar(4000),@p35 decimal(17,15),@p36 int,@p37 tinyint,@p38 decimal(1,0),@p39 bigint,@p40 nvarchar(4000),@p41 decimal(5,4),@p42 nvarchar(4000),@p43 decimal(17,15),@p44 int,@p45 tinyint,@p46 decimal(1,0),@p47 bigint,@p48 nvarchar(4000),@p49 decimal(5,4),@p50 nvarchar(4000),@p51 decimal(17,15),@p52 int,@p53 tinyint,@p54 decimal(1,0),@p55 bigint,@p56 nvarchar(4000),@p57 decimal(5,4),@p58 nvarchar(4000),@p59 decimal(17,15),@p60 int,@p61 tinyint,@p62 decimal(1,0),@p63 bigint,@p64 nvarchar(4000),@p65 decimal(5,4),@p66 nvarchar(4000),@p67 decimal(17,15),@p68 int,@p6   </inputbuf>
  </process>
  <process id="process202715a5848" taskpriority="0" logused="855980" waitresource="KEY: 7:72057594043236352 (39c9529c1a80)" waittime="3841" ownerId="6294746" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:08.467" XDES="0x20269474490" lockMode="S" schedulerid="2" kpid="29744" status="suspended" spid="67" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:13.770" lastbatchcompleted="2020-08-26T15:23:13.757" lastattention="1900-01-01T00:00:00.757" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294746" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73728" stmtend="110166" sqlhandle="0x0200000045e14010c29c7110c8ba274a0810d01d7814e9f90000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p0 decimal(1,0),@p1 bigint,@p2 nvarchar(4000),@p3 decimal(2,2),@p4 nvarchar(4000),@p5 decimal(3,3),@p6 int,@p7 tinyint,@p8 decimal(1,0),@p9 bigint,@p10 nvarchar(4000),@p11 decimal(3,2),@p12 nvarchar(4000),@p13 decimal(5,3),@p14 int,@p15 tinyint,@p16 decimal(1,0),@p17 bigint,@p18 nvarchar(4000),@p19 decimal(2,2),@p20 nvarchar(4000),@p21 decimal(4,3),@p22 int,@p23 tinyint,@p24 decimal(1,0),@p25 bigint,@p26 nvarchar(4000),@p27 decimal(3,2),@p28 nvarchar(4000),@p29 decimal(4,3),@p30 int,@p31 tinyint,@p32 decimal(1,0),@p33 bigint,@p34 nvarchar(4000),@p35 decimal(2,2),@p36 nvarchar(4000),@p37 decimal(17,17),@p38 int,@p39 tinyint,@p40 decimal(1,0),@p41 bigint,@p42 nvarchar(4000),@p43 decimal(2,2),@p44 nvarchar(4000),@p45 decimal(16,16),@p46 int,@p47 tinyint,@p48 decimal(1,0),@p49 bigint,@p50 nvarchar(4000),@p51 decimal(3,2),@p52 nvarchar(4000),@p53 decimal(17,15),@p54 int,@p55 tinyint,@p56 decimal(1,0),@p57 bigint,@p58 nvarchar(4000),@p59 decimal(3,2),@p60 nvarchar(4000),@p61 decimal(16,15),@p62 int,@p63 tinyint,   </inputbuf>
  </process>
 </process-list>
 <resource-list>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20238cb3d80" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process202715a5848" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process2026c423088" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20279061100" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process2026c423088" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process202715a5848" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
 </resource-list>
</deadlock>




[HttpPost（“上传”）]
公共异步任务上载（[FromForm]格式文件）
{
if（file==null | | file.Length==0）
{
返回请求（）；
}
使用var fileStream=file.OpenReadStream（）；
wait Handler.SaveFromFile（fileStream，file.FileName）；
返回Ok（）；
}


我尝试在启动中设置重试。cs:


[HttpPost("Upload")]
public async Task<ActionResult> Upload([FromForm]IFormFile file)
{
    if (file == null || file.Length == 0)
    {
        return BadRequest();
    }

    using var fileStream = file.OpenReadStream();

    await Handler.SaveFromFile(fileStream, file.FileName);

    return Ok();
}



    services.AddDbContext<TestDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"), builder => 
    {
        builder.EnableRetryOnFailure(5, TimeSpan.FromSeconds(10), null);
    }));



<deadlock>
 <victim-list>
  <victimProcess id="process2026c423088" />
 </victim-list>
 <process-list>
  <process id="process2026c423088" taskpriority="0" logused="94536" waitresource="KEY: 7:72057594043236352 (5d937923d5a3)" waittime="3199" ownerId="6294993" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:12.940" XDES="0x2026ed30490" lockMode="S" schedulerid="3" kpid="21092" status="suspended" spid="66" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:14.487" lastbatchcompleted="2020-08-26T15:23:14.227" lastattention="1900-01-01T00:00:00.227" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294993" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73724" stmtend="110198" sqlhandle="0x02000000b605be0cf972a469745510a34ff7a63c7c992a5c0000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p6 decimal(1,0),@p7 bigint,@p8 nvarchar(4000),@p9 decimal(2,2),@p10 nvarchar(4000),@p11 decimal(3,3),@p12 int,@p13 tinyint,@p14 decimal(1,0),@p15 bigint,@p16 nvarchar(4000),@p17 decimal(4,4),@p18 nvarchar(4000),@p19 decimal(5,5),@p20 int,@p21 tinyint,@p22 decimal(1,0),@p23 bigint,@p24 nvarchar(4000),@p25 decimal(5,4),@p26 nvarchar(4000),@p27 decimal(17,15),@p28 int,@p29 tinyint,@p30 decimal(1,0),@p31 bigint,@p32 nvarchar(4000),@p33 decimal(5,4),@p34 nvarchar(4000),@p35 decimal(17,15),@p36 int,@p37 tinyint,@p38 decimal(1,0),@p39 bigint,@p40 nvarchar(4000),@p41 decimal(5,4),@p42 nvarchar(4000),@p43 decimal(17,15),@p44 int,@p45 tinyint,@p46 decimal(1,0),@p47 bigint,@p48 nvarchar(4000),@p49 decimal(5,4),@p50 nvarchar(4000),@p51 decimal(17,15),@p52 int,@p53 tinyint,@p54 decimal(1,0),@p55 bigint,@p56 nvarchar(4000),@p57 decimal(5,4),@p58 nvarchar(4000),@p59 decimal(17,15),@p60 int,@p61 tinyint,@p62 decimal(1,0),@p63 bigint,@p64 nvarchar(4000),@p65 decimal(5,4),@p66 nvarchar(4000),@p67 decimal(17,15),@p68 int,@p6   </inputbuf>
  </process>
  <process id="process202715a5848" taskpriority="0" logused="855980" waitresource="KEY: 7:72057594043236352 (39c9529c1a80)" waittime="3841" ownerId="6294746" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:08.467" XDES="0x20269474490" lockMode="S" schedulerid="2" kpid="29744" status="suspended" spid="67" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:13.770" lastbatchcompleted="2020-08-26T15:23:13.757" lastattention="1900-01-01T00:00:00.757" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294746" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73728" stmtend="110166" sqlhandle="0x0200000045e14010c29c7110c8ba274a0810d01d7814e9f90000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p0 decimal(1,0),@p1 bigint,@p2 nvarchar(4000),@p3 decimal(2,2),@p4 nvarchar(4000),@p5 decimal(3,3),@p6 int,@p7 tinyint,@p8 decimal(1,0),@p9 bigint,@p10 nvarchar(4000),@p11 decimal(3,2),@p12 nvarchar(4000),@p13 decimal(5,3),@p14 int,@p15 tinyint,@p16 decimal(1,0),@p17 bigint,@p18 nvarchar(4000),@p19 decimal(2,2),@p20 nvarchar(4000),@p21 decimal(4,3),@p22 int,@p23 tinyint,@p24 decimal(1,0),@p25 bigint,@p26 nvarchar(4000),@p27 decimal(3,2),@p28 nvarchar(4000),@p29 decimal(4,3),@p30 int,@p31 tinyint,@p32 decimal(1,0),@p33 bigint,@p34 nvarchar(4000),@p35 decimal(2,2),@p36 nvarchar(4000),@p37 decimal(17,17),@p38 int,@p39 tinyint,@p40 decimal(1,0),@p41 bigint,@p42 nvarchar(4000),@p43 decimal(2,2),@p44 nvarchar(4000),@p45 decimal(16,16),@p46 int,@p47 tinyint,@p48 decimal(1,0),@p49 bigint,@p50 nvarchar(4000),@p51 decimal(3,2),@p52 nvarchar(4000),@p53 decimal(17,15),@p54 int,@p55 tinyint,@p56 decimal(1,0),@p57 bigint,@p58 nvarchar(4000),@p59 decimal(3,2),@p60 nvarchar(4000),@p61 decimal(16,15),@p62 int,@p63 tinyint,   </inputbuf>
  </process>
 </process-list>
 <resource-list>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20238cb3d80" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process202715a5848" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process2026c423088" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20279061100" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process2026c423088" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process202715a5848" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
 </resource-list>
</deadlock>




services.AddDbContext（options=>options.UseSqlServer（Configuration.GetConnectionString（“DefaultConnection”），builder=>
{
builder.EnableRetryOnFailure（5，TimeSpan.FromSeconds（10），null）；
}));


@丹·古兹曼询问死锁信息

来自系统运行状况跟踪的死锁信息：


[HttpPost("Upload")]
public async Task<ActionResult> Upload([FromForm]IFormFile file)
{
    if (file == null || file.Length == 0)
    {
        return BadRequest();
    }

    using var fileStream = file.OpenReadStream();

    await Handler.SaveFromFile(fileStream, file.FileName);

    return Ok();
}



    services.AddDbContext<TestDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"), builder => 
    {
        builder.EnableRetryOnFailure(5, TimeSpan.FromSeconds(10), null);
    }));



<deadlock>
 <victim-list>
  <victimProcess id="process2026c423088" />
 </victim-list>
 <process-list>
  <process id="process2026c423088" taskpriority="0" logused="94536" waitresource="KEY: 7:72057594043236352 (5d937923d5a3)" waittime="3199" ownerId="6294993" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:12.940" XDES="0x2026ed30490" lockMode="S" schedulerid="3" kpid="21092" status="suspended" spid="66" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:14.487" lastbatchcompleted="2020-08-26T15:23:14.227" lastattention="1900-01-01T00:00:00.227" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294993" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73724" stmtend="110198" sqlhandle="0x02000000b605be0cf972a469745510a34ff7a63c7c992a5c0000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p6 decimal(1,0),@p7 bigint,@p8 nvarchar(4000),@p9 decimal(2,2),@p10 nvarchar(4000),@p11 decimal(3,3),@p12 int,@p13 tinyint,@p14 decimal(1,0),@p15 bigint,@p16 nvarchar(4000),@p17 decimal(4,4),@p18 nvarchar(4000),@p19 decimal(5,5),@p20 int,@p21 tinyint,@p22 decimal(1,0),@p23 bigint,@p24 nvarchar(4000),@p25 decimal(5,4),@p26 nvarchar(4000),@p27 decimal(17,15),@p28 int,@p29 tinyint,@p30 decimal(1,0),@p31 bigint,@p32 nvarchar(4000),@p33 decimal(5,4),@p34 nvarchar(4000),@p35 decimal(17,15),@p36 int,@p37 tinyint,@p38 decimal(1,0),@p39 bigint,@p40 nvarchar(4000),@p41 decimal(5,4),@p42 nvarchar(4000),@p43 decimal(17,15),@p44 int,@p45 tinyint,@p46 decimal(1,0),@p47 bigint,@p48 nvarchar(4000),@p49 decimal(5,4),@p50 nvarchar(4000),@p51 decimal(17,15),@p52 int,@p53 tinyint,@p54 decimal(1,0),@p55 bigint,@p56 nvarchar(4000),@p57 decimal(5,4),@p58 nvarchar(4000),@p59 decimal(17,15),@p60 int,@p61 tinyint,@p62 decimal(1,0),@p63 bigint,@p64 nvarchar(4000),@p65 decimal(5,4),@p66 nvarchar(4000),@p67 decimal(17,15),@p68 int,@p6   </inputbuf>
  </process>
  <process id="process202715a5848" taskpriority="0" logused="855980" waitresource="KEY: 7:72057594043236352 (39c9529c1a80)" waittime="3841" ownerId="6294746" transactionname="user_transaction" lasttranstarted="2020-08-26T15:23:08.467" XDES="0x20269474490" lockMode="S" schedulerid="2" kpid="29744" status="suspended" spid="67" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2020-08-26T15:23:13.770" lastbatchcompleted="2020-08-26T15:23:13.757" lastattention="1900-01-01T00:00:00.757" clientapp="Core Microsoft SqlClient Data Provider" hostname="DESKTOP" hostpid="18656" loginname="kamil" isolationlevel="read committed (2)" xactid="6294746" currentdb="7" lockTimeout="4294967295" clientoption1="673185824" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="3" stmtstart="73728" stmtend="110166" sqlhandle="0x0200000045e14010c29c7110c8ba274a0810d01d7814e9f90000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p0 decimal(1,0),@p1 bigint,@p2 nvarchar(4000),@p3 decimal(2,2),@p4 nvarchar(4000),@p5 decimal(3,3),@p6 int,@p7 tinyint,@p8 decimal(1,0),@p9 bigint,@p10 nvarchar(4000),@p11 decimal(3,2),@p12 nvarchar(4000),@p13 decimal(5,3),@p14 int,@p15 tinyint,@p16 decimal(1,0),@p17 bigint,@p18 nvarchar(4000),@p19 decimal(2,2),@p20 nvarchar(4000),@p21 decimal(4,3),@p22 int,@p23 tinyint,@p24 decimal(1,0),@p25 bigint,@p26 nvarchar(4000),@p27 decimal(3,2),@p28 nvarchar(4000),@p29 decimal(4,3),@p30 int,@p31 tinyint,@p32 decimal(1,0),@p33 bigint,@p34 nvarchar(4000),@p35 decimal(2,2),@p36 nvarchar(4000),@p37 decimal(17,17),@p38 int,@p39 tinyint,@p40 decimal(1,0),@p41 bigint,@p42 nvarchar(4000),@p43 decimal(2,2),@p44 nvarchar(4000),@p45 decimal(16,16),@p46 int,@p47 tinyint,@p48 decimal(1,0),@p49 bigint,@p50 nvarchar(4000),@p51 decimal(3,2),@p52 nvarchar(4000),@p53 decimal(17,15),@p54 int,@p55 tinyint,@p56 decimal(1,0),@p57 bigint,@p58 nvarchar(4000),@p59 decimal(3,2),@p60 nvarchar(4000),@p61 decimal(16,15),@p62 int,@p63 tinyint,   </inputbuf>
  </process>
 </process-list>
 <resource-list>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20238cb3d80" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process202715a5848" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process2026c423088" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
  <keylock hobtid="72057594043236352" dbid="7" objectname="TestDB.dbo.SavedFiles" indexname="PK_SavedFiles" id="lock20279061100" mode="X" associatedObjectId="72057594043236352">
   <owner-list>
    <owner id="process2026c423088" mode="X" />
   </owner-list>
   <waiter-list>
    <waiter id="process202715a5848" mode="S" requestType="wait" />
   </waiter-list>
  </keylock>
 </resource-list>
</deadlock>





不为人知
不为人知
（@p6十进制数（1,0），@p7-bigint，@p8-nvarchar（4000），@p9十进制数（2,2），@p10-nvarchar（4000），@p11十进制数（3,3），@p12-int，@p13-tinyint，@p14十进制数（1,0），@p15-bigint，@p16-nvarchar（4000），@p17十进制数（4,4），@p18-nvarchar（4000），@p19十进制数（5,5），@p20-int，@p21-tinyint，@p22十进制数（1,0），@p23-bigint，@p24-nvarcharcharcharcharchar），p25-nvarcharcharcharcharcharcharchar（4000），@p25,4000），@p24十进制数），@p27十进制（17,15），@p28 int，@p29 tinyint，@p30 decimal（1,0），@p31 bigint，@p32 nvarchar（4000），@p33 decimal（5,4），@p34 nvarchar（4000），@p35 decimal（17,15），@p36 int，@p37 tinyint，@p38 decimal（1,0），@p39 bigint，@p40 nvarchar（4000），@p41 decimal（5,4），@p42 nvarchar）nvarchar（4000），@p43 decimal,17,15），@p44 tinyint，@p45 tinyint，nvarcharchar，@p41,8（4000），@p49十进制（5,4），@p50 nvarchar（4000），@p51十进制（17,15），@p52 int，@p53 tinyint，@p54十进制（1,0），@p55 bigint，@p56 nvarchar（4000），@p57十进制（5,4），@p58 nvarchar（4000），@p59十进制（17,15），@p60 int，@p61 tinyint，@p62十进制（1,0），@p63 bigint，@p64 nvarchar（4000），@p65十进制（5,4），@p66 nvarchar），@p67 nvarchar），@p67十进制（4000），@p68），@p68,17，@p68，@p68,17,17,17
不为人知
不为人知
（@p0十进制（1,0），@p1-bigint，@p2-nvarchar（4000），@p3十进制（2,2），@p4-nvarchar（4000），@p5十进制（3,3），@p6-int，@p7-tinyint，@p8十进制（1,0），@p9-bigint，@p10-nvarchar（4000），@p11十进制（3,2），@p12-nvarcharchar十进制（4000），@p13十进制（5,3），@p14-int，@p15-tinyint，@p16十进制（1,0），@p17-bigint，@p18-nvarcharcharcharchar（4000），@p18-nvarcharcharcharcharcharcharcharcharchar），@p12,4000），@p12,p20），@p19十进制，（p12），@p11,4000），@p1（4,3），@p22 int，@p23 tinyint，@p24 decimal（1,0），@p25 bigint，@p26 nvarchar（4000），@p27 decimal（3,2），@p28 nvarchar（4000），@p29 decimal（4,3），@p30 int，@p31 tinyint，@p32 decimal（1,0），@p33 bigint，@p34 nvarchar（4000），@p35 decimal（2,2），@p36 nvarchar（4000），@p37 decimal）（17,17），@p38 int，@p39 tinyint，@p39 tinyint，@p34 nvarcharcharchar，（4000），@p41,4）decimal，@p41,4000），@p42 decimal，@p41,3（2,2），@p44-nvarchar（4000），@p45-decimal（16,16），@p46-int，@p47-tinyint，@p48-decimal（1,0），@p49-bigint，@p50-nvarchar（4000），@p51-decimal（3,2），@p52-nvarchar（4000），@p53-decimal（17,15），@p54-tinyint，@p56-decimal（1,0），@p57-bigint，@p58-nvarchar（4000），@p59-decimal）（3,2），@p60-nvarchar（4000），@p60-nvarchar），decimal（4000），@p61-decimal）（16,15），@p62，@p62，

您可以使用锁定语句：

简单的例子：


private static object lockPad = new object(); 

[HttpPost("Upload")]

public async Task Upload([FromForm]IFormFile file) 
{ 
  if (file == null || file.Length == 0) 
  { 
    return BadRequest(); 
  }

  using var fileStream = file.OpenReadStream();

  lock (lockPad)
  {
    await Handler.SaveFromFile(fileStream, file.FileName);
  }

  return Ok();
}



您能添加整个控制器操作和重试尝试吗？关于避免死锁，查询索引优化通常有助于最小化所接触的数据。如果需要帮助，请将执行计划上载到。此外，您还可以确定死锁资源。@Guruston我编辑了我的文章，包括了整个控制器和重试配置。@DanGuzman我从system_health trace（未设置重试时）中包含死锁信息。我不太明白执行计划是什么意思。您的问题已经在这里得到了回答：我不确定它是否对一个控制器有帮助，但即使有帮助，不同控制器（不同类）之间仍然存在冲突插入到同一个表中的死锁发生在SQL级别，而不是主机语言，而且它运行在API级别，因此每个请求都有自己的死锁context@kkamil4sz这只是一个简单的示例，您可以在其他位置（例如Startup.cs）拥有一个公共和静态锁，并在将其插入此表时使用它。