diff --git a/bin/pt-duplicate-key-checker b/bin/pt-duplicate-key-checker
index 72aecbcd..beff3671 100755
--- a/bin/pt-duplicate-key-checker
+++ b/bin/pt-duplicate-key-checker
@@ -3443,7 +3443,14 @@ sub _iterate_dbh {
             && $self->_resume_from_table($tbl)
             && $self->table_is_allowed($self->{db}, $tbl);
          }
-         @{$dbh->selectall_arrayref($sql)};
+
+         eval { @{$dbh->selectall_arrayref($sql)}; };
+         if ($EVAL_ERROR) {
+             warn "Skipping $self->{db}...";
+             $self->{db} = undef;
+             next;
+         }
+
          PTDEBUG && _d('Found', scalar @tbls, 'tables in database',$self->{db});
          $self->{tbls} = \@tbls;
       }
diff --git a/bin/pt-index-usage b/bin/pt-index-usage
index 3cd45b1b..de937c0b 100755
--- a/bin/pt-index-usage
+++ b/bin/pt-index-usage
@@ -4221,7 +4221,14 @@ sub _iterate_dbh {
             && $self->_resume_from_table($tbl)
             && $self->table_is_allowed($self->{db}, $tbl);
          }
-         @{$dbh->selectall_arrayref($sql)};
+
+         eval { @{$dbh->selectall_arrayref($sql)}; };
+         if ($EVAL_ERROR) {
+             warn "Skipping $self->{db}...";
+             $self->{db} = undef;
+             next;
+         }
+
          PTDEBUG && _d('Found', scalar @tbls, 'tables in database',$self->{db});
          $self->{tbls} = \@tbls;
       }
diff --git a/bin/pt-table-checksum b/bin/pt-table-checksum
index 4e2f2a09..3048e2d6 100755
--- a/bin/pt-table-checksum
+++ b/bin/pt-table-checksum
@@ -7566,7 +7566,14 @@ sub _iterate_dbh {
             && $self->_resume_from_table($tbl)
             && $self->table_is_allowed($self->{db}, $tbl);
          }
-         @{$dbh->selectall_arrayref($sql)};
+
+         eval { @{$dbh->selectall_arrayref($sql)}; };
+         if ($EVAL_ERROR) {
+             warn "Skipping $self->{db}...";
+             $self->{db} = undef;
+             next;
+         }
+
          PTDEBUG && _d('Found', scalar @tbls, 'tables in database',$self->{db});
          $self->{tbls} = \@tbls;
       }
diff --git a/bin/pt-table-sync b/bin/pt-table-sync
index 91455e48..90a5f411 100755
--- a/bin/pt-table-sync
+++ b/bin/pt-table-sync
@@ -7777,7 +7777,14 @@ sub _iterate_dbh {
             && $self->_resume_from_table($tbl)
             && $self->table_is_allowed($self->{db}, $tbl);
          }
-         @{$dbh->selectall_arrayref($sql)};
+
+         eval { @{$dbh->selectall_arrayref($sql)}; };
+         if ($EVAL_ERROR) {
+             warn "Skipping $self->{db}...";
+             $self->{db} = undef;
+             next;
+         }
+
          PTDEBUG && _d('Found', scalar @tbls, 'tables in database',$self->{db});
          $self->{tbls} = \@tbls;
       }
diff --git a/lib/SchemaIterator.pm b/lib/SchemaIterator.pm
index 928ec4c6..923b894d 100644
--- a/lib/SchemaIterator.pm
+++ b/lib/SchemaIterator.pm
@@ -353,7 +353,14 @@ sub _iterate_dbh {
             && $self->_resume_from_table($tbl)
             && $self->table_is_allowed($self->{db}, $tbl);
          }
-         @{$dbh->selectall_arrayref($sql)};
+
+         eval { @{$dbh->selectall_arrayref($sql)}; };
+         if ($EVAL_ERROR) {
+             warn "Skipping $self->{db}...";
+             $self->{db} = undef;
+             next;
+         }
+
          PTDEBUG && _d('Found', scalar @tbls, 'tables in database',$self->{db});
          $self->{tbls} = \@tbls;
       }
diff --git a/t/pt-table-checksum/pt-105.t b/t/pt-table-checksum/pt-105.t
new file mode 100644
index 00000000..d52bd67d
--- /dev/null
+++ b/t/pt-table-checksum/pt-105.t
@@ -0,0 +1,84 @@
+#!/usr/bin/env perl
+
+BEGIN {
+   die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
+      unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
+   unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
+};
+
+use strict;
+use warnings FATAL => 'all';
+use English qw(-no_match_vars);
+use Test::More;
+
+use PerconaTest;
+use Sandbox;
+use SqlModes;
+use threads;
+use Time::HiRes qw( usleep );
+use constant PTDEBUG => $ENV{PTDEBUG} || 0;
+
+require "$trunk/bin/pt-table-checksum";
+
+my $dp  = new DSNParser(opts=>$dsn_opts);
+my $sb  = new Sandbox(basedir => '/tmp', DSNParser => $dp);
+my $dbh = $sb->get_dbh_for('master');
+
+if ( !$dbh ) {
+   plan skip_all => 'Cannot connect to sandbox master';
+}
+else {
+   plan tests => 2;
+}
+
+my $db_count = 100;
+
+sub start_thread {
+   my ($dsn_opts, $initial_sleep_time, $sleep_time, $db_count) = @_;
+   my $dp = new DSNParser(opts=>$dsn_opts);
+   my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp);
+   my $dbh = $sb->get_dbh_for('master');
+   PTDEBUG && diag("Thread started: Sleeping $initial_sleep_time milliseconds before start dropping DBs");
+   usleep($initial_sleep_time );
+   for (my $i=0; $i < $db_count; $i++) {
+       PTDEBUG && diag("Dropping drop_test_$i");
+       $dbh->do("DROP DATABASE IF EXISTS drop_test_$i");
+       usleep($sleep_time * 1000)
+   }
+   PTDEBUG && diag("Exit thread")
+}
+my $thr = threads->create('start_thread', $dsn_opts, 1000, 100, $db_count);
+threads->yield();
+
+sleep(3);
+for (my $i=0; $i < $db_count; $i++) {
+    $dbh->do("DROP DATABASE IF EXISTS drop_test_$i");
+    $dbh->do("CREATE SCHEMA drop_test_$i")
+}
+
+# The sandbox servers run with lock_wait_timeout=3 and it's not dynamic
+# so we need to specify --set-vars innodb_lock_wait_timeout=3 else the tool will die.
+# And --max-load "" prevents waiting for status variables.
+my $master_dsn = 'h=127.1,P=12345,u=msandbox,p=msandbox';
+my @args       = ($master_dsn, qw(--no-check-binlog-format)); 
+my $output;
+
+$output = output(
+   sub { pt_table_checksum::main(@args) },
+   stderr => 1,
+);
+
+unlike(
+   $output,
+   qr/db selectall_arrayref failed/,
+   "Dropping tables while checksum is running"
+);
+
+$thr->join();
+
+# #############################################################################
+# Done.
+# #############################################################################
+$sb->wipe_clean($dbh);
+ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
+exit;