metadata_test.py

import threading
import time
import logging
import pytest

from dtest import Tester

logger = logging.getLogger(__name__)


class TestMetadata(Tester):

    def force_compact(self):
        cluster = self.cluster
        (node1, node2) = cluster.nodelist()
        node1.nodetool("compact keyspace1 standard1")

    def force_repair(self):
        cluster = self.cluster
        (node1, node2) = cluster.nodelist()
        node1.nodetool('repair keyspace1 standard1')

    def do_read(self):
        cluster = self.cluster
        (node1, node2) = cluster.nodelist()

        node1.stress(['read', 'no-warmup', 'n=30000', '-schema', 'replication(factor=2)', 'compression=LZ4Compressor',
                      '-rate', 'threads=1'])

    @pytest.mark.skip(reason='hangs CI')
    def test_metadata_reset_while_compact(self):
        """
        Resets the schema while a compact, read and repair happens.
        All kinds of glorious things can fail.
        """
        # while the schema is being reset, there will inevitably be some
        # queries that will error with this message
        self.fixture_dtest_setup.ignore_log_patterns = ['.*Unknown keyspace/cf pair.*']

        cluster = self.cluster
        cluster.populate(2).start()
        (node1, node2) = cluster.nodelist()

        node1.nodetool("disableautocompaction")
        node1.nodetool("setcompactionthroughput 1")

        for i in range(3):
            node1.stress(['write', 'no-warmup', 'n=30000', '-schema', 'replication(factor=2)',
                          'compression=LZ4Compressor', '-rate', 'threads=5', '-pop', 'seq=1..30000'])
            node1.flush()

        thread = threading.Thread(target=self.force_compact)
        thread.start()
        time.sleep(1)

        thread2 = threading.Thread(target=self.force_repair)
        thread2.start()
        time.sleep(5)

        thread3 = threading.Thread(target=self.do_read)
        thread3.start()
        time.sleep(5)

        node1.nodetool("resetlocalschema")

        thread.join()
        thread2.join()
        thread3.join()