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https://issues.apache.org/jira/browse/IGNITE-13020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17713946#comment-17713946
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Chenjian commented on IGNITE-13020:
-----------------------------------
[~jooger] Doubts about the code GridH2Table.lock, the lock logic would lay in
the for loop, why design like this?
> Schema change operation failed: Thread got interrupted while trying to
> acquire table lock.
> ------------------------------------------------------------------------------------------
>
> Key: IGNITE-13020
> URL: https://issues.apache.org/jira/browse/IGNITE-13020
> Project: Ignite
> Issue Type: Bug
> Components: sql
> Affects Versions: 2.8
> Reporter: JiajunYang
> Priority: Major
>
> Ignite throws sql exception sometimes while do ddl actions concurrently.The
> exception looks like:
> java.sql.SQLException: Schema change operation failed: Thread got
> interrupted while trying to acquire table lock.
> at
>
> org.apache.ignite.internal.jdbc.thin.JdbcThinConnection.sendRequest(JdbcThinConnection.java:901)
> at
>
> org.apache.ignite.internal.jdbc.thin.JdbcThinStatement.execute0(JdbcThinStatement.java:231)
> at
>
> org.apache.ignite.internal.jdbc.thin.JdbcThinStatement.execute(JdbcThinStatement.java:559)
> at
> ....
> at java.lang.Thread.run(Thread.java:748)
>
> Here is one reproduce case:
> 1.Start a ignite without persitence enabled.
> 2.Use two threads to do ddl operations concurrently.
> 3.Each ddl opertion contains create table and create indices sqls.Send these
> sqls to ignite in one statement.
> 4.Do ddl operations repeatly and then wait for luck.U can add a system.exit
> when u get the exception.
>
> Here is my test code for u reference:
> public class ConcurrentCreateTable {
> private static Connection conn;
> private static Connection conn1;
> public static void main(String[] args) throws Exception {
> initialize();
> new Thread(new Runnable() {
> @Override
> public void run() {
> while (true) {
> try (Statement stmt = conn.createStatement())
> { stmt.execute( "CREATE
> TABLE IF NOT EXISTS city1(ID INTEGER,NAME VARCHAR,NAME1 VARCHAR ,PRIMARY
> KEY(ID)) WITH \"template=replicated\";" +
> "CREATE INDEX IF NOT EXISTS city1_name ON city1(NAME);CREATE INDEX IF NOT
> EXISTS city1_name1 on city1(NAME1);");
> stmt.execute("DROP TABLE IF EXISTS city1");
> System.out.println("XXX"); }
> catch (SQLException e)
> { e.printStackTrace(); }
> }
> }
> }).start();
> new Thread(new Runnable() {
>
> @Override
> public void run() {
> while (true) {
> try (Statement stmt = conn1.createStatement()) \{
> stmt.execute( "CREATE TABLE IF
> NOT EXISTS city2(ID INTEGER,NAME VARCHAR, NAME1 VARCHAR ,PRIMARY KEY(ID))
> WITH \"template=replicated\";" + "CREATE
> INDEX IF NOT EXISTS city2_name ON city2(NAME);CREATE INDEX IF NOT EXISTS
> city2_name1 on city2(NAME1);"); stmt.execute("DROP
> TABLE IF EXISTS city2"); System.out.println("XXX");
> } catch (SQLException e) \{
> e.printStackTrace(); }
> }
> }
> }).start();
> while (true)
> { }
> }
> private static void initialize() throws Exception
> { Class.forName(Config.IGNITE_DRIVER); final Properties props
> = new Properties(); conn =
> DriverManager.getConnection(Config.IGNITE_URL, props); conn1 =
> DriverManager.getConnection(Config.IGNITE_URL, props); }
> }
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