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https://github.com/ClickHouse/ClickHouse.git
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125 lines
6.4 KiB
Bash
Executable File
125 lines
6.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# shellcheck source=./mergetree_mutations.lib
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. "$CURDIR"/mergetree_mutations.lib
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function try_sync_replicas()
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{
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table_name_prefix=$1
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time_left=$2
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readarray -t empty_partitions_arr < <(${CLICKHOUSE_CLIENT} -q \
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"SELECT DISTINCT substr(new_part_name, 1, position(new_part_name, '_') - 1) AS partition_id
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FROM system.replication_queue
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WHERE (database = currentDatabase()) AND (table LIKE '$table_name_prefix%') AND (last_exception LIKE '%No active replica has part%') AND (partition_id NOT IN (
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SELECT partition_id
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FROM system.parts
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WHERE (database = currentDatabase()) AND (table LIKE '$table_name_prefix%')
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))")
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readarray -t tables_arr < <(${CLICKHOUSE_CLIENT} -q "SELECT name FROM system.tables WHERE database=currentDatabase() AND name like '$table_name_prefix%' AND engine like '%Replicated%'")
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for t in "${tables_arr[@]}"
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do
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for p in "${empty_partitions_arr[@]}"
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do
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# Avoid "Empty part ... is not created instead of lost part because there are no parts in partition"
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$CLICKHOUSE_CLIENT -q "ALTER TABLE $t DROP PARTITION ID '$p'" 2>/dev/null
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done
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done
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i=0
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for t in "${tables_arr[@]}"
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do
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# Do not start new merges (it can make SYNC a bit faster)
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$CLICKHOUSE_CLIENT -q "ALTER TABLE $t MODIFY SETTING max_replicated_merges_in_queue=0"
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$CLICKHOUSE_CLIENT --receive_timeout $time_left -q "SYSTEM SYNC REPLICA $t STRICT" || ($CLICKHOUSE_CLIENT -q \
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"select 'sync failed, queue:', * from system.replication_queue where database=currentDatabase() and table='$t' order by database, table, node_name" && exit 1) &
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pids[${i}]=$!
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i=$((i + 1))
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done
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for pid in "${pids[@]}"; do
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wait $pid || (echo "Failed to sync some replicas" && exit 1)
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done
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echo "Replication did not hang: synced all replicas of $table_name_prefix"
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}
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function check_replication_consistency()
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{
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table_name_prefix=$1
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check_query_part=$2
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# Wait for all queries to finish (query may still be running if thread is killed by timeout)
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num_tries=0
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while [[ $($CLICKHOUSE_CLIENT -q "SELECT count() FROM system.processes WHERE current_database=currentDatabase() AND query LIKE '%$table_name_prefix%'") -ne 1 ]]; do
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sleep 1;
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num_tries=$((num_tries+1))
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if [ $num_tries -eq 250 ]; then
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echo "Queries for $table_name_prefix did not finish automatically after 250+ seconds"
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echo "==================== QUERIES ===================="
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$CLICKHOUSE_CLIENT -q "SELECT * FROM system.processes WHERE current_database=currentDatabase() AND query LIKE '%$table_name_prefix%' FORMAT Vertical"
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echo "==================== STACK TRACES ===================="
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$CLICKHOUSE_CLIENT -q "SELECT query_id, thread_name, thread_id, arrayStringConcat(arrayMap(x -> demangle(addressToSymbol(x)), trace), '\n') FROM system.stack_trace where query_id IN (SELECT query_id FROM system.processes WHERE current_database=currentDatabase() AND query LIKE '%$table_name_prefix%') SETTINGS allow_introspection_functions=1 FORMAT Vertical"
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echo "==================== MUTATIONS ===================="
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$CLICKHOUSE_CLIENT -q "SELECT * FROM system.mutations WHERE current_database=currentDatabase() FORMAT Vertical"
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break
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fi
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done
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# Touch all data to check that it's readable (and trigger PartCheckThread if needed)
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while ! $CLICKHOUSE_CLIENT -q "SELECT * FROM merge(currentDatabase(), '$table_name_prefix') FORMAT Null" 2>/dev/null; do
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sleep 1;
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num_tries=$((num_tries+1))
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if [ $num_tries -eq 250 ]; then
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break
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fi
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done
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time_left=$((300 - num_tries))
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# Do not check anything if all replicas are readonly,
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# because is this case all replicas are probably lost (it may happen and it's not a bug)
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res=$($CLICKHOUSE_CLIENT -q "SELECT count() - sum(is_readonly) FROM system.replicas WHERE database=currentDatabase() AND table LIKE '$table_name_prefix%'")
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if [ $res -eq 0 ]; then
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# Print dummy lines
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echo "Replication did not hang: synced all replicas of $table_name_prefix"
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echo "Consistency: 1"
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return 0
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fi
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# Trigger pullLogsToQueue(...) and updateMutations(...) on some replica to make it pull all mutations, so it will be possible to kill them
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some_table=$($CLICKHOUSE_CLIENT -q "SELECT name FROM system.tables WHERE database=currentDatabase() AND name like '$table_name_prefix%' ORDER BY rand() LIMIT 1")
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$CLICKHOUSE_CLIENT -q "SYSTEM SYNC REPLICA $some_table PULL" 1>/dev/null 2>/dev/null ||:
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some_table=$($CLICKHOUSE_CLIENT -q "SELECT name FROM system.tables WHERE database=currentDatabase() AND name like '$table_name_prefix%' ORDER BY rand() LIMIT 1")
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$CLICKHOUSE_CLIENT -q "SYSTEM SYNC REPLICA $some_table PULL" 1>/dev/null 2>/dev/null ||:
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# Forcefully cancel mutations to avoid waiting for them to finish
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${CLICKHOUSE_CLIENT} -q "KILL MUTATION WHERE database=currentDatabase() AND table like '$table_name_prefix%'" > /dev/null
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# SYNC REPLICA is not enough if some MUTATE_PARTs are not assigned yet
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wait_for_all_mutations "$table_name_prefix%"
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try_sync_replicas "$table_name_prefix" "$time_left" || exit 1
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res=$($CLICKHOUSE_CLIENT -q \
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"SELECT
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if((countDistinct(data) as c) == 0, 1, c)
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FROM
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(
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SELECT _table, ($check_query_part) AS data
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FROM merge(currentDatabase(), '$table_name_prefix') GROUP BY _table
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)")
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echo "Consistency: $res"
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if [ $res -ne 1 ]; then
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echo "Replicas have diverged:"
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$CLICKHOUSE_CLIENT -q "select 'data', _table, $check_query_part, arraySort(groupArrayDistinct(_part)) from merge(currentDatabase(), '$table_name_prefix') group by _table order by _table"
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$CLICKHOUSE_CLIENT -q "select 'queue', * from system.replication_queue where database=currentDatabase() and table like '$table_name_prefix%' order by database, table, node_name"
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$CLICKHOUSE_CLIENT -q "select 'mutations', * from system.mutations where database=currentDatabase() and table like '$table_name_prefix%' order by database, table, mutation_id"
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$CLICKHOUSE_CLIENT -q "select 'parts', * from system.parts where database=currentDatabase() and table like '$table_name_prefix%' order by database, table, name"
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echo "Good luck with debugging..."
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exit 1
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fi
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}
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# vi: ft=bash
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