Fossil: Check-in [f525b6d5]

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Overview

Comment:	Improved SQL logging after SIGPIPE. Exponential backoff in the warnings issued when the backoffice process misses its deadline.
Downloads:	Tarball \| ZIP archive \| SQL archive
Timelines:	family \| ancestors \| descendants \| both \| trunk
Files:	files \| file ages \| folders
SHA3-256:	f525b6d5e9dcb775a931aa2949684d9b02ce57f959fa3aff4c9982f4be2a5699
User & Date:	drh 2018-07-19 16:27:51

Context

2018-07-19
17:22		The email_auto_exec property is removed. The routine that sends alert emails is renamed to email_backoffice() and it is configured to always auto-run. check-in: ada7ecde user: drh tags: trunk
16:27		Improved SQL logging after SIGPIPE. Exponential backoff in the warnings issued when the backoffice process misses its deadline. check-in: f525b6d5 user: drh tags: trunk
15:58		At the end of CGI processing, close the output pipe before starting backoffice processing, in order to let higher levels know that the CGI is finished. check-in: a32a92d2 user: drh tags: trunk

Changes

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Changes to src/backoffice.c.

** routine enters a loop to do background work periodically.
*/
void backoffice_run(void){
  Lease x;
  sqlite3_uint64 tmNow;
  sqlite3_uint64 idSelf;
  int lastWarning = 0;


  if( g.db==0 ){
    fossil_panic("database not open for backoffice processing");
  }
  if( db_transaction_nesting_depth()!=0 ){
    fossil_panic("transaction %s not closed prior to backoffice processing",
                 db_transaction_start_point());
................................................................................
    x.idNext = idSelf;
    x.tmNext = (tmNow>x.tmCurrent ? tmNow : x.tmCurrent) + BKOFCE_LEASE_TIME;
    backofficeWriteLease(&x);
    db_end_transaction(0);
    if( x.tmCurrent >= tmNow ){
      sqlite3_sleep(1000*(x.tmCurrent - tmNow + 1));
    }else{
      if( lastWarning+30 < tmNow ){
        fossil_warning(
           "backoffice process %lld still running after %d seconds",
           x.idCurrent, (int)(BKOFCE_LEASE_TIME + tmNow - x.tmCurrent));
        lastWarning = tmNow;

      }
      sqlite3_sleep(1000);
    }
  }
  return;
}

** routine enters a loop to do background work periodically.
*/
void backoffice_run(void){
  Lease x;
  sqlite3_uint64 tmNow;
  sqlite3_uint64 idSelf;
  int lastWarning = 0;
  int warningDelay = 30;

  if( g.db==0 ){
    fossil_panic("database not open for backoffice processing");
  }
  if( db_transaction_nesting_depth()!=0 ){
    fossil_panic("transaction %s not closed prior to backoffice processing",
                 db_transaction_start_point());
................................................................................
    x.idNext = idSelf;
    x.tmNext = (tmNow>x.tmCurrent ? tmNow : x.tmCurrent) + BKOFCE_LEASE_TIME;
    backofficeWriteLease(&x);
    db_end_transaction(0);
    if( x.tmCurrent >= tmNow ){
      sqlite3_sleep(1000*(x.tmCurrent - tmNow + 1));
    }else{
      if( lastWarning+warningDelay < tmNow ){
        fossil_warning(
           "backoffice process %lld still running after %d seconds",
           x.idCurrent, (int)(BKOFCE_LEASE_TIME + tmNow - x.tmCurrent));
        lastWarning = tmNow;
        warningDelay *= 2;
      }
      sqlite3_sleep(1000);
    }
  }
  return;
}

Changes to src/db.c.

  }
  g.repositoryOpen = 0;
  g.localOpen = 0;
  assert( g.dbConfig==0 );
  assert( g.zConfigDbName==0 );
}
















/*
** Create a new empty repository database with the given name.
**
** Only the schema is initialized.  The required VAR tables entries
** are not set by this routine and must be set separately in order
** to make the new file a valid database.








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  }
  g.repositoryOpen = 0;
  g.localOpen = 0;
  assert( g.dbConfig==0 );
  assert( g.zConfigDbName==0 );
}

/*
** Close the database as quickly as possible without unnecessary processing.
*/
void db_panic_close(void){
  if( g.db ){
    int rc;
    sqlite3_wal_checkpoint(g.db, 0);
    rc = sqlite3_close(g.db);
    if( g.fSqlTrace ) fossil_trace("-- sqlite3_close(%d)\n", rc);
  }
  g.db = 0;
  g.repositoryOpen = 0;
  g.localOpen = 0;
}

/*
** Create a new empty repository database with the given name.
**
** Only the schema is initialized.  The required VAR tables entries
** are not set by this routine and must be set separately in order
** to make the new file a valid database.

Changes to src/main.c.

/*
** Called if a server gets a SIGPIPE.  This often happens when a client
** webbrowser opens a connection but never sends the HTTP request
*/
void sigpipe_handler(int x){
#ifndef _WIN32
  if( g.fAnyTrace ){
    fprintf(stderr,"/**** sigpipe received by subprocess %d ****\n", getpid());
  }
#endif

  fossil_exit(1);
}

/*
** Preconditions:
**
**  * Environment variables are set up according to the CGI standard.
**








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/*
** Called if a server gets a SIGPIPE.  This often happens when a client
** webbrowser opens a connection but never sends the HTTP request
*/
void sigpipe_handler(int x){
#ifndef _WIN32
  if( g.fAnyTrace ){
    fprintf(stderr,"/***** sigpipe received by subprocess %d ****\n", getpid());
  }
#endif
  db_panic_close();
  exit(1);
}

/*
** Preconditions:
**
**  * Environment variables are set up according to the CGI standard.
**