Confirmed. Fatal error on https://he.wikipedia.org/w/index.php?title=%D7%9E%D7%99%D7%95%D7%97%D7%93:%D7%A9%D7%99%D7%A0%D7%95%D7%99%D7%99%D7%9D_%D7%90%D7%97%D7%A8%D7%95%D7%A0%D7%99%D7%9D&days=30000000000&from=

Internal error
[WV7GqwpAEK0AABLho7gAAAAQ] 2017-07-06 23:24:27: Fatal exception of type "Wikimedia\Timestamp\TimestampException"

From Logstash

Wikimedia\Timestamp\ConvertibleTimestamp::setTimestamp: Invalid timestamp - -2591998500614400

t exception.trace	   	#0 /srv/mediawiki/php-1.30.0-wmf.7/vendor/wikimedia/timestamp/src/ConvertibleTimestamp.php(68): Wikimedia\Timestamp\ConvertibleTimestamp->setTimestamp(integer)
#1 /srv/mediawiki/php-1.30.0-wmf.7/includes/libs/rdbms/database/Database.php(2992): Wikimedia\Timestamp\ConvertibleTimestamp->__construct(integer)
#2 /srv/mediawiki/php-1.30.0-wmf.7/includes/specials/SpecialRecentchanges.php(379): Wikimedia\Rdbms\Database->timestamp(integer)
#3 /srv/mediawiki/php-1.30.0-wmf.7/includes/specialpage/ChangesListSpecialPage.php(582): SpecialRecentChanges->buildQuery(array, array, array, array, array, FormOptions)
#4 /srv/mediawiki/php-1.30.0-wmf.7/includes/specialpage/ChangesListSpecialPage.php(520): ChangesListSpecialPage->getRows()
#5 /srv/mediawiki/php-1.30.0-wmf.7/includes/specials/SpecialRecentchanges.php(167): ChangesListSpecialPage->execute(NULL)
#6 /srv/mediawiki/php-1.30.0-wmf.7/includes/specialpage/SpecialPage.php(522): SpecialRecentChanges->execute(NULL)
#7 /srv/mediawiki/php-1.30.0-wmf.7/includes/specialpage/SpecialPageFactory.php(579): SpecialPage->run(NULL)
#8 /srv/mediawiki/php-1.30.0-wmf.7/includes/MediaWiki.php(287): SpecialPageFactory::executePath(Title, RequestContext)
#9 /srv/mediawiki/php-1.30.0-wmf.7/includes/MediaWiki.php(862): MediaWiki->performRequest()
#10 /srv/mediawiki/php-1.30.0-wmf.7/includes/MediaWiki.php(523): MediaWiki->main()
#11 /srv/mediawiki/php-1.30.0-wmf.7/index.php(43): MediaWiki->run()
#12 /srv/mediawiki/w/index.php(3): include(string)
#13 {main}

class SpecialRecentchanges { protected function buildQuery( .. ) {
		/ Calculate cutoff
		$cutoff_unixtime = time() - ( $opts['days'] * 86400 );
		$cutoff_unixtime = $cutoff_unixtime - ( $cutoff_unixtime % 86400 );
		$cutoff = $dbr->timestamp( $cutoff_unixtime ); # <!-- line 379

		$fromValid = preg_match( '/^[0-9]{14}$/', $opts['from'] );
		if ( $fromValid && $opts['from'] > wfTimestamp( TS_MW, $cutoff ) ) {
			$cutoff = $dbr->timestamp( $opts['from'] );

I can reproduce it in isolation.

$opts = [ 'days' => 30000 ];
$cutoff_unixtime = time() - ( $opts['days'] * 86400 );
$cutoff_unixtime = $cutoff_unixtime - ( $cutoff_unixtime % 86400 );
$t = new Wikimedia\Timestamp\ConvertibleTimestamp( $cutoff_unixtime );
echo $t;
#> -1092614400
echo $t->getTimestamp( TS_MW );
#> 19350519000000

$opts = [ 'days' => 700000 ];
$cutoff_unixtime = time() - ( $opts['days'] * 86400 );$cutoff_unixtime = $cutoff_unixtime - ( $cutoff_unixtime % 86400 );
$t = new Wikimedia\Timestamp\ConvertibleTimestamp( $cutoff_unixtime );
echo $t->getTimestamp( TS_MW );
#> 01001224000000

$opts = [ 'days' => 800000 ];
$cutoff_unixtime = time() - ( $opts['days'] * 86400 );$cutoff_unixtime = $cutoff_unixtime - ( $cutoff_unixtime % 86400 );
$t = new Wikimedia\Timestamp\ConvertibleTimestamp( $cutoff_unixtime );
echo $t->getTimestamp( TS_MW );
#> Caught exception Wikimedia\Timestamp\TimestampException:
#> The timestamp cannot be represented in the specified format

$opts = [ 'days' => 30000000000 ];
$cutoff_unixtime = time() - ( $opts['days'] * 86400 );
$cutoff_unixtime = $cutoff_unixtime - ( $cutoff_unixtime % 86400 );
$t = new Wikimedia\Timestamp\ConvertibleTimestamp( $cutoff_unixtime );
#> Caught exception Wikimedia\Timestamp\TimestampException:
#> Invalid timestamp - -2591998500614400

Note, this is not a problem with the database or with data from recent changes. The error is not caused by the processing of recent changes, rather, the error happens much earlier (which is why it responds so quickly).

Before we query the recent changes database, we first convert days to a normal timestamp as offset for the to-be query This converting of the days parameter to a timestamp is what fails.