v2.1.8 release notes

Released: June 19, 2020 (2.1.8.2-b1).

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Docker

docker pull yugabytedb/yugabyte:2.1.8.2-b1

YSQL

• Add support for SPLIT INTO clause for CREATE INDEX statement. #3047 
• Fix aggregate functions pushdown for columns with default values added after table creation. #4376 
• Resolve timeout frequently encountered whe batch-loading data in YSQL by using client-specified timeouts for RPC requests instead of hardcoded values. #4045 
• Fix incorrect cross-component dependency in DocDB found in builds using ninja. #4474 
• Fix operation buffering in stored procedures to handle transactions correctly. #4268 
• [DocDB] Ensure that fast path (pushed down) single row writes honor higher priority transactions and get aborted or retired instead. #4316 
• [DocDB] Split copy table operations into smaller chunks (using byte size instead of count) for CREATE DATABASE statement. #3743 
• Correctly push down IS NULL condition to DocDB. #4499 
• Avoid ASAN failures after a large data set is uploaded by rearranging files and test functionalities. #4488 
• Fix memory leaks by using memory context to manage object alloc and free. #4490 
• Fix multi-touch cache and improve caching logic for read and write operations. #4379 
• Improve index cost estimates by considering index uniqueness, included columns (index scan vs. index only scan), scan direction, and partial indexes. Also, disable merge joins for unsupported cases. #4494  and #4496 
• Add support for deferrable foreign key constraints. #3995 
• Prevent dropping primary key constraint. #3163 
• Push down SELECT (), for example, SELECT COUNT(1) , to DocDB. #4276 
• Fix rare core dumps due to concurrency issues in metrics webserver during shutdown. #4092 

YCQL

• Rename cqlsh to ycqlsh. #3935 
• Update Cassandra Java driver version to 3.8.0-yb-4 and adds support for guava  26 or later. The latest release of the driver is available in the Yugabyte cassandra-java-driver repository . #3897 
• YB-TServers should not crash when attempting to log in using YCQL authentication without a password. #4459 
• Performance degradation in CassandraSecondaryIndex workload resolved. #4401 
• Add yb-admin import_snapshot support for renaming a few tables (not all), but the specified name is equal to the old table name: yb-admin import_snapshot <meta-file> ks old_table_name. #4280 
• For DDL creation with Spring Data Cassandra, change the Enum value from JSON to JSONB to allow schema creation to succeed programmatically involving JSON column types and update the cassandra-java-driver to 3.8.0-yb-5. #4481 
• Use the same timestamp for current time to compute multiple runtimes in output of <tserver-ip>:13000/rpcz. #4418 
• Correctly push down = NULL condition to DocDB. #4499 
• Reduce YCQL unprepared statement execution time by up to 98% (example: reduced time to insert a 5 MB string from 18 seconds to 0.25 seconds). #4397  and #3586 
  • Special thanks to @ouvai59  for your contribution!

YEDIS

• For yugabyted, do not start redis server by default. Resolves port conflict during startup. #4057 

System improvements

• New yb-admin command get_load_balancer_state to get the cluster load balancer state. #4509 
• Avoid creating intent iterator when no transactions are running. #4500 
• Increase default memory limit for yb-master for running in low-memory setups (<=4 GB). #3742 
• Improve RocksDB checkpoint directory cleanup if a tserver crashes or is restarted while performing a snapshot operation. #4352 
• [DocDB] Use bloom filters for range-partitioned tables. The first primary key column is added to the bloom filter. #4437 
• [DocDB] Fix snapshots bootstrap order bu altering the load for transaction-aware snapshots. #4470 
• [DocDB] Add [yb-admin master_leader_stepdown](../../../x admin/yb-admin/#master-leader-stepdown) command. #4135 
• [DocDB] Reduce impact on CPU and throughput during node failures. #4042 
• [DocDB] Add yb-ts-cli commands, flush_all_tablets and flush_tablet <tablet_id>, to flush tablets. When used with rolling restarts, less time is spent applying WAL records to rocksdb. #2785 
  • Special thanks to mirageyjd  for your contribution.
• [DocDB] Fix deadlock during tablet splitting. #4312 
• Introduced load balancing throttle on the total number of tablets being remote bootstrapped, across the cluster. #4053  and #4436 
• [DocDB] Remove applied intent doc hybrid time during compaction. #4535 
• [DocDB] Fixed BoundedRocksDbIterator::SeekToLast works incorrectly for 2nd post-split tablet. #4542 
• [DocDB] Abort snapshot if table was deleted. #4610 
• [DocDB] Backfill index without waiting indefinitely for pending transactions. #3471 
• [DocDB] Fix yb-master rerunning snapshot operations after upgrade. #4816 
• [Colocation] During load balancing operations, load balance each colocated tablet once. This fix removes unnecessary load balancing for every user table sharing that table and the parent table.
• Fix YB-Master hangs due to transaction status resolution. #4410 
• Redirect the master UI to the master leader UI without failing when one master is down. #4442  and #3869 
• Avoid race in change_metadata_operation. Use atomic<P*> to avoid race between Finish() and ToString from updating or accessing request. #3912 
• Refactor RaftGroupMetadata to avoid keeping unnecessary TableInfo objects in memory. #4354 
• Fix missing rows in unidirectional replication and fix race conditions with CDC and TransactionManager. #4257 
• Change intent iterator creation logic. #4543 
• Upgrade all Python scripts used to build and package the code to Python 3. #1442 

Yugabyte Platform

• Fix failure when adding a node on a TLS-enabled universe. #4482 
• Improve latency tracking by splitting overall operation metrics into individual rows for each API. #3825 
  • YCQL and YEDIS metrics include ops, avg latency, and P99 latency.
  • YSQL metrics include only ops and avg latency.
• Add metrics for RPC queue sizes of services, including YB-Master, YB-TServer, YCQL, and YEDIS. #4294 
• Add option to edit configuration flags without requiring server restart. #4433 
• When configuration flags are deleted in the YugabyteDB Admin Console, remove the flags from server.conf file. #4341 
• When creating GCP instances, only use host project when specifying network.
• When creating a cloud provider configuration, display provider-level (non-k8s) settings for SSH ports and enabling airgapped installations. #3615 , #4243 , and #4240 .
• After removing a node and then adding a node, check for certificate and key files and create the files if needed. #4551 
• Update to support Helm 3 deployments. Note: Helm 2 is no longer supported. For migrating existing Helm 2 universes to Helm 3, see Migrate from Helm 2 to Helm 3. #4416
• Change QLTableRow representation. #4427 
• Fix CDC-related race conditions using CDCServiceTxnTest.TestGetChangesForPendingTransaction. #4544 
• Revert validation on alerting email field to allow comma-separated emails in the form. #4639 
• Add Custom SMTP Configuration section to Health & Alerting tab on customer profile page. #4443 
• Fix Kubernetes pod container metrics not displaying in Metrics panel. #4652 
• Fix Backups tab not rendering when there are no backups. #4661