Stanislav Lukyanov created IGNITE-11829:
-------------------------------------------
Summary: Distribute joins fail if number of tables > 7
Key: IGNITE-11829
URL: https://issues.apache.org/jira/browse/IGNITE-11829
Project: Ignite
Issue Type: Improvement
Components: sql
Affects Versions: 2.7
Reporter: Stanislav Lukyanov
Distributed joins fail with ArrayIndexOutOfBounds when the total number of
tables is > 7.
Example:
{code}
try (Ignite ignite =
Ignition.start("examples/config/example-ignite.xml");) {
IgniteCache cache = ignite.createCache("foo");
cache.query(new SqlFieldsQuery("CREATE TABLE Person(ID INTEGER
PRIMARY KEY, NAME VARCHAR(100));"));
cache.query(new SqlFieldsQuery("INSERT INTO Person(ID, NAME) VALUES
(1, 'Ed'), (2, 'Ann'), (3, 'Emma');"));
cache.query(new SqlFieldsQuery("SELECT *\n" +
"FROM PERSON P1\n" +
"JOIN PERSON P2 ON P1.ID = P2.ID\n" +
"JOIN PERSON P3 ON P1.ID = P3.ID\n" +
"JOIN PERSON P4 ON P1.ID = P4.ID\n" +
"JOIN PERSON P5 ON P1.ID = P5.ID\n" +
"JOIN PERSON P6 ON P1.ID = P6.ID\n" +
"JOIN PERSON P7 ON P1.ID = P7.ID\n" +
"JOIN PERSON P8 ON P1.ID =
P8.ID").setDistributedJoins(true).setEnforceJoinOrder(false));
}
{code}
throws
{code}
Exception in thread "main" javax.cache.CacheException: General error:
"java.lang.ArrayIndexOutOfBoundsException" [50000-197]
at
org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:832)
at
org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:765)
at
org.apache.ignite.internal.processors.cache.GatewayProtectedCacheProxy.query(GatewayProtectedCacheProxy.java:403)
at
org.apache.ignite.examples.ExampleNodeStartup.main(ExampleNodeStartup.java:60)
Caused by: class
org.apache.ignite.internal.processors.query.IgniteSQLException: General error:
"java.lang.ArrayIndexOutOfBoundsException" [50000-197]
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parseH2(QueryParser.java:454)
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parse0(QueryParser.java:156)
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parse(QueryParser.java:121)
at
org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.querySqlFields(IgniteH2Indexing.java:1191)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2261)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2257)
at
org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:53)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2767)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.lambda$querySqlFields$1(GridQueryProcessor.java:2277)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuerySafe(GridQueryProcessor.java:2297)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2250)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2177)
at
org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:817)
... 3 more
Caused by: org.h2.jdbc.JdbcSQLException: General error:
"java.lang.ArrayIndexOutOfBoundsException" [50000-197]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:357)
at org.h2.message.DbException.get(DbException.java:168)
at org.h2.message.DbException.convert(DbException.java:307)
at org.h2.message.DbException.toSQLException(DbException.java:280)
at org.h2.message.TraceObject.logAndConvert(TraceObject.java:357)
at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:308)
at
org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.prepare(GridSqlQuerySplitter.java:1770)
at
org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split0(GridSqlQuerySplitter.java:299)
at
org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split(GridSqlQuerySplitter.java:219)
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parseH2(QueryParser.java:415)
... 15 more
Caused by: java.lang.ArrayIndexOutOfBoundsException
at java.lang.System.arraycopy(Native Method)
at
org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.childFilters(CollocationModel.java:240)
at
org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.buildCollocationModel(CollocationModel.java:733)
at
org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.distributedMultiplier(CollocationModel.java:667)
at
org.apache.ignite.internal.processors.query.h2.opt.GridH2IndexBase.getDistributedMultiplier(GridH2IndexBase.java:128)
at
org.apache.ignite.internal.processors.query.h2.opt.H2TableScanIndex.getCost(H2TableScanIndex.java:94)
at org.h2.table.Table.getBestPlanItem(Table.java:714)
at org.h2.table.TableFilter.getBestPlanItem(TableFilter.java:224)
at org.h2.table.Plan.calculateCost(Plan.java:121)
at
org.h2.command.dml.Optimizer.calculateBruteForceSome(Optimizer.java:137)
at org.h2.command.dml.Optimizer.calculateBestPlan(Optimizer.java:87)
at org.h2.command.dml.Optimizer.optimize(Optimizer.java:239)
at org.h2.command.dml.Select.preparePlan(Select.java:1018)
at org.h2.command.dml.Select.prepare(Select.java:884)
at org.h2.command.Parser.prepareCommand(Parser.java:283)
at org.h2.engine.Session.prepareLocal(Session.java:611)
at org.h2.engine.Session.prepareCommand(Session.java:549)
at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1247)
at
org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76)
at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:304)
... 19 more
{code}
or if run with -ea
{code}
Exception in thread "main" java.lang.AssertionError
at
org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.childFilters(CollocationModel.java:237)
at
org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.buildCollocationModel(CollocationModel.java:733)
at
org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.distributedMultiplier(CollocationModel.java:667)
at
org.apache.ignite.internal.processors.query.h2.opt.GridH2IndexBase.getDistributedMultiplier(GridH2IndexBase.java:128)
at
org.apache.ignite.internal.processors.query.h2.opt.H2TableScanIndex.getCost(H2TableScanIndex.java:94)
at org.h2.table.Table.getBestPlanItem(Table.java:714)
at org.h2.table.TableFilter.getBestPlanItem(TableFilter.java:224)
at org.h2.table.Plan.calculateCost(Plan.java:121)
at
org.h2.command.dml.Optimizer.calculateBruteForceSome(Optimizer.java:137)
at org.h2.command.dml.Optimizer.calculateBestPlan(Optimizer.java:87)
at org.h2.command.dml.Optimizer.optimize(Optimizer.java:239)
at org.h2.command.dml.Select.preparePlan(Select.java:1018)
at org.h2.command.dml.Select.prepare(Select.java:884)
at org.h2.command.Parser.prepareCommand(Parser.java:283)
at org.h2.engine.Session.prepareLocal(Session.java:611)
at org.h2.engine.Session.prepareCommand(Session.java:549)
at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1247)
at
org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76)
at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:304)
at
org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.prepare(GridSqlQuerySplitter.java:1770)
at
org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split0(GridSqlQuerySplitter.java:299)
at
org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split(GridSqlQuerySplitter.java:219)
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parseH2(QueryParser.java:415)
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parse0(QueryParser.java:156)
at
org.apache.ignite.internal.processors.query.h2.QueryParser.parse(QueryParser.java:121)
at
org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.querySqlFields(IgniteH2Indexing.java:1191)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2261)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2257)
at
org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:53)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2767)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.lambda$querySqlFields$1(GridQueryProcessor.java:2277)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuerySafe(GridQueryProcessor.java:2297)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2250)
at
org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2177)
at
org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:817)
at
org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:765)
at
org.apache.ignite.internal.processors.cache.GatewayProtectedCacheProxy.query(GatewayProtectedCacheProxy.java:403)
at
org.apache.ignite.examples.ExampleNodeStartup.main(ExampleNodeStartup.java:60)
{code}
The reason for 7 being the magic number seems to be H2's
Optimizer.MAX_BRUTE_FORCE_FILTERS = 7. When exceeding that, the behavior of H2
code changes - to something Ignite doesn't expect.
Apparently enforceJoinOrder=true is a workaround - in that case Ignite doesn't
really try to compute the cost of the joins and doesn't execute the buggy code
path.
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