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Deadlock

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Un interblocage (ou étreinte fatale, deadlock en anglais) est un phénomène qui peut survenir en programmation concurrente. L'interblocage se produit lorsque deux processus concurrents s'attendent mutuellement.

Dans la vie :



Dans les logs :


Code TEXT :
 
2018-09-24 02:06:50,947 [pool-1192-thread-9    ] WARN  org.hibernate.util.JDBCExceptionReporter - SQL Error: 0, SQLState: 40P01 
2018-09-24 02:06:50,949 [pool-1192-thread-9    ] ERROR org.hibernate.util.JDBCExceptionReporter - ERROR: deadlock detected 
  Détail : Process 29732 waits for ShareLock on transaction 118224841; blocked by process 8982. 
Process 8982 waits for ShareLock on transaction 118224832; blocked by process 1781. 
Process 1781 waits for ShareLock on transaction 118224839; blocked by process 29732. 
  Indice : See server log for query details. 
        at java.lang.Thread.run(Thread.java:724) 
Caused by: java.util.concurrent.ExecutionException: org.hibernate.exception.GenericJDBCException: could not execute update query 
        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252) 
        at java.util.concurrent.FutureTask.get(FutureTask.java:111) 
        ... 13 more 
Caused by: org.hibernate.exception.GenericJDBCException: could not execute update query 
        at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140) 
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128) 
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
        at org.hibernate.hql.ast.exec.BasicExecutor.execute(BasicExecutor.java:110) 
        at org.hibernate.hql.ast.QueryTranslatorImpl.executeUpdate(QueryTranslatorImpl.java:421) 
        at org.hibernate.engine.query.HQLQueryPlan.performExecuteUpdate(HQLQueryPlan.java:283) 
        at org.hibernate.impl.SessionImpl.executeUpdate(SessionImpl.java:1278) 
        at org.hibernate.impl.QueryImpl.executeUpdate(QueryImpl.java:117) 
        ... 5 more 
Caused by: org.postgresql.util.PSQLException: ERROR: deadlock detected 
  Détail : Process 29732 waits for ShareLock on transaction 118224841; blocked by process 8982. 
Process 8982 waits for ShareLock on transaction 118224832; blocked by process 1781.[/size] 
 


Un batch de plus KO à cause d'un deadlock...