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[GitHub] [hive] deniskuzZ opened a new pull request #2825: HIVE-25115: Addendum: Restore multi-threaded support in Cleaner
deniskuzZ opened a new pull request #2825:
URL: https://github.com/apache/hive/pull/2825
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[GitHub] [hive] deniskuzZ commented on a change in pull request #2825: HIVE-25115: Addendum: Restore multi-threaded support in Cleaner
Posted by GitBox <gi...@apache.org>.
deniskuzZ commented on a change in pull request #2825:
URL: https://github.com/apache/hive/pull/2825#discussion_r763787981
##########
File path: itests/hive-unit/src/test/java/org/apache/hadoop/hive/ql/txn/compactor/TestCompactor.java
##########
@@ -1621,6 +1621,7 @@ public void mmTableOpenWriteId() throws Exception {
verifyFooBarResult(tblName, 2);
verifyHasBase(table.getSd(), fs, "base_0000005_v0000016");
runCleaner(conf);
+ runCleaner(conf);
Review comment:
added
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[GitHub] [hive] klcopp commented on a change in pull request #2825: HIVE-25115: Addendum: Restore multi-threaded support in Cleaner
Posted by GitBox <gi...@apache.org>.
klcopp commented on a change in pull request #2825:
URL: https://github.com/apache/hive/pull/2825#discussion_r763165482
##########
File path: itests/hive-unit/src/test/java/org/apache/hadoop/hive/ql/txn/compactor/TestCompactor.java
##########
@@ -1621,6 +1621,7 @@ public void mmTableOpenWriteId() throws Exception {
verifyFooBarResult(tblName, 2);
verifyHasBase(table.getSd(), fs, "base_0000005_v0000016");
runCleaner(conf);
+ runCleaner(conf);
Review comment:
Wherever the double cleaner runs, I think you should add a comment explaining why
##########
File path: standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/CompactionTxnHandler.java
##########
@@ -323,57 +323,62 @@ public void markCompacted(CompactionInfo info) throws MetaException {
@Override
@RetrySemantics.ReadOnly
public List<CompactionInfo> findReadyToClean(long minOpenTxnWaterMark, long retentionTime) throws MetaException {
- Connection dbConn = null;
- List<CompactionInfo> rc = new ArrayList<>();
-
- Statement stmt = null;
- ResultSet rs = null;
try {
- try {
- dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
- stmt = dbConn.createStatement();
+ List<CompactionInfo> rc = new ArrayList<>();
+
+ try (Connection dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+ Statement stmt = dbConn.createStatement()) {
/*
* By filtering on minOpenTxnWaterMark, we will only cleanup after every transaction is committed, that could see
* the uncompacted deltas. This way the cleaner can clean up everything that was made obsolete by this compaction.
*/
- String s = "SELECT \"CQ_ID\", \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\", "
- + "\"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\" FROM \"COMPACTION_QUEUE\" WHERE \"CQ_STATE\" = '"
- + READY_FOR_CLEANING + "'";
+ String whereClause = " WHERE \"CQ_STATE\" = '" + READY_FOR_CLEANING + "'";
if (minOpenTxnWaterMark > 0) {
- s = s + " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
+ whereClause += " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
}
if (retentionTime > 0) {
- s = s + " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
+ whereClause += " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
}
- s = s + " ORDER BY \"CQ_HIGHEST_WRITE_ID\", \"CQ_ID\"";
+ String s = "SELECT \"CQ_ID\", \"cq1\".\"CQ_DATABASE\", \"cq1\".\"CQ_TABLE\", \"cq1\".\"CQ_PARTITION\"," +
+ " \"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\", \"CQ_TBLPROPERTIES\"" +
+ " FROM \"COMPACTION_QUEUE\" \"cq1\" " +
+ "INNER JOIN (" +
+ " SELECT MIN(\"CQ_HIGHEST_WRITE_ID\") \"WRITE_ID\", \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\"" +
+ " FROM \"COMPACTION_QUEUE\""
+ + whereClause +
+ " GROUP BY \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\") \"cq2\" " +
+ "ON \"cq1\".\"CQ_DATABASE\" = \"cq2\".\"CQ_DATABASE\""+
+ " AND \"cq1\".\"CQ_TABLE\" = \"cq2\".\"CQ_TABLE\""+
+ " AND (\"cq1\".\"CQ_PARTITION\" = \"cq2\".\"CQ_PARTITION\"" +
+ " OR \"cq1\".\"CQ_PARTITION\" IS NULL AND \"cq2\".\"CQ_PARTITION\" IS NULL)"
+ + whereClause +
+ " AND \"CQ_HIGHEST_WRITE_ID\" = \"WRITE_ID\"" +
+ " ORDER BY \"CQ_ID\"";
LOG.debug("Going to execute query <" + s + ">");
- rs = stmt.executeQuery(s);
- while (rs.next()) {
- CompactionInfo info = new CompactionInfo();
- info.id = rs.getLong(1);
- info.dbname = rs.getString(2);
- info.tableName = rs.getString(3);
- info.partName = rs.getString(4);
- info.type = dbCompactionType2ThriftType(rs.getString(5).charAt(0));
- info.runAs = rs.getString(6);
- info.highestWriteId = rs.getLong(7);
- if (LOG.isDebugEnabled()) {
- LOG.debug("Found ready to clean: " + info.toString());
+ try (ResultSet rs = stmt.executeQuery(s)) {
+ while (rs.next()) {
+ CompactionInfo info = new CompactionInfo();
+ info.id = rs.getLong(1);
+ info.dbname = rs.getString(2);
+ info.tableName = rs.getString(3);
+ info.partName = rs.getString(4);
+ info.type = dbCompactionType2ThriftType(rs.getString(5).charAt(0));
+ info.runAs = rs.getString(6);
+ info.highestWriteId = rs.getLong(7);
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Found ready to clean: " + info.toString());
+ }
+ rc.add(info);
}
- rc.add(info);
}
return rc;
} catch (SQLException e) {
LOG.error("Unable to select next element for cleaning, " + e.getMessage());
- LOG.debug("Going to rollback");
- rollbackDBConn(dbConn);
Review comment:
Is this covered by the close() method?
##########
File path: standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/CompactionTxnHandler.java
##########
@@ -323,57 +323,62 @@ public void markCompacted(CompactionInfo info) throws MetaException {
@Override
@RetrySemantics.ReadOnly
public List<CompactionInfo> findReadyToClean(long minOpenTxnWaterMark, long retentionTime) throws MetaException {
- Connection dbConn = null;
- List<CompactionInfo> rc = new ArrayList<>();
-
- Statement stmt = null;
- ResultSet rs = null;
try {
- try {
- dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
- stmt = dbConn.createStatement();
+ List<CompactionInfo> rc = new ArrayList<>();
+
+ try (Connection dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+ Statement stmt = dbConn.createStatement()) {
/*
* By filtering on minOpenTxnWaterMark, we will only cleanup after every transaction is committed, that could see
* the uncompacted deltas. This way the cleaner can clean up everything that was made obsolete by this compaction.
*/
- String s = "SELECT \"CQ_ID\", \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\", "
- + "\"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\" FROM \"COMPACTION_QUEUE\" WHERE \"CQ_STATE\" = '"
- + READY_FOR_CLEANING + "'";
+ String whereClause = " WHERE \"CQ_STATE\" = '" + READY_FOR_CLEANING + "'";
if (minOpenTxnWaterMark > 0) {
- s = s + " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
+ whereClause += " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
}
if (retentionTime > 0) {
- s = s + " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
+ whereClause += " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
}
- s = s + " ORDER BY \"CQ_HIGHEST_WRITE_ID\", \"CQ_ID\"";
+ String s = "SELECT \"CQ_ID\", \"cq1\".\"CQ_DATABASE\", \"cq1\".\"CQ_TABLE\", \"cq1\".\"CQ_PARTITION\"," +
+ " \"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\", \"CQ_TBLPROPERTIES\"" +
+ " FROM \"COMPACTION_QUEUE\" \"cq1\" " +
+ "INNER JOIN (" +
Review comment:
Sorry, why is this join needed? Why not just the min(CQ_HIGHEST_WRITE_ID) + group by?
Could you also write a short comment about what this query is doing and why
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[GitHub] [hive] deniskuzZ commented on a change in pull request #2825: HIVE-25115: Addendum: Restore multi-threaded support in Cleaner
Posted by GitBox <gi...@apache.org>.
deniskuzZ commented on a change in pull request #2825:
URL: https://github.com/apache/hive/pull/2825#discussion_r763776755
##########
File path: standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/CompactionTxnHandler.java
##########
@@ -323,57 +323,62 @@ public void markCompacted(CompactionInfo info) throws MetaException {
@Override
@RetrySemantics.ReadOnly
public List<CompactionInfo> findReadyToClean(long minOpenTxnWaterMark, long retentionTime) throws MetaException {
- Connection dbConn = null;
- List<CompactionInfo> rc = new ArrayList<>();
-
- Statement stmt = null;
- ResultSet rs = null;
try {
- try {
- dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
- stmt = dbConn.createStatement();
+ List<CompactionInfo> rc = new ArrayList<>();
+
+ try (Connection dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+ Statement stmt = dbConn.createStatement()) {
/*
* By filtering on minOpenTxnWaterMark, we will only cleanup after every transaction is committed, that could see
* the uncompacted deltas. This way the cleaner can clean up everything that was made obsolete by this compaction.
*/
- String s = "SELECT \"CQ_ID\", \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\", "
- + "\"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\" FROM \"COMPACTION_QUEUE\" WHERE \"CQ_STATE\" = '"
- + READY_FOR_CLEANING + "'";
+ String whereClause = " WHERE \"CQ_STATE\" = '" + READY_FOR_CLEANING + "'";
if (minOpenTxnWaterMark > 0) {
- s = s + " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
+ whereClause += " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
}
if (retentionTime > 0) {
- s = s + " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
+ whereClause += " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
}
- s = s + " ORDER BY \"CQ_HIGHEST_WRITE_ID\", \"CQ_ID\"";
+ String s = "SELECT \"CQ_ID\", \"cq1\".\"CQ_DATABASE\", \"cq1\".\"CQ_TABLE\", \"cq1\".\"CQ_PARTITION\"," +
+ " \"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\", \"CQ_TBLPROPERTIES\"" +
+ " FROM \"COMPACTION_QUEUE\" \"cq1\" " +
+ "INNER JOIN (" +
Review comment:
because WRITE_ID is not unique, we can have same write_id allocated for dif combinations of tables where it's not the latest
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[GitHub] [hive] deniskuzZ commented on a change in pull request #2825: HIVE-25115: Addendum: Restore multi-threaded support in Cleaner
Posted by GitBox <gi...@apache.org>.
deniskuzZ commented on a change in pull request #2825:
URL: https://github.com/apache/hive/pull/2825#discussion_r763777180
##########
File path: standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/CompactionTxnHandler.java
##########
@@ -323,57 +323,62 @@ public void markCompacted(CompactionInfo info) throws MetaException {
@Override
@RetrySemantics.ReadOnly
public List<CompactionInfo> findReadyToClean(long minOpenTxnWaterMark, long retentionTime) throws MetaException {
- Connection dbConn = null;
- List<CompactionInfo> rc = new ArrayList<>();
-
- Statement stmt = null;
- ResultSet rs = null;
try {
- try {
- dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
- stmt = dbConn.createStatement();
+ List<CompactionInfo> rc = new ArrayList<>();
+
+ try (Connection dbConn = getDbConn(Connection.TRANSACTION_READ_COMMITTED);
+ Statement stmt = dbConn.createStatement()) {
/*
* By filtering on minOpenTxnWaterMark, we will only cleanup after every transaction is committed, that could see
* the uncompacted deltas. This way the cleaner can clean up everything that was made obsolete by this compaction.
*/
- String s = "SELECT \"CQ_ID\", \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\", "
- + "\"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\" FROM \"COMPACTION_QUEUE\" WHERE \"CQ_STATE\" = '"
- + READY_FOR_CLEANING + "'";
+ String whereClause = " WHERE \"CQ_STATE\" = '" + READY_FOR_CLEANING + "'";
if (minOpenTxnWaterMark > 0) {
- s = s + " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
+ whereClause += " AND (\"CQ_NEXT_TXN_ID\" <= " + minOpenTxnWaterMark + " OR \"CQ_NEXT_TXN_ID\" IS NULL)";
}
if (retentionTime > 0) {
- s = s + " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
+ whereClause += " AND \"CQ_COMMIT_TIME\" < (" + getEpochFn(dbProduct) + " - " + retentionTime + ")";
}
- s = s + " ORDER BY \"CQ_HIGHEST_WRITE_ID\", \"CQ_ID\"";
+ String s = "SELECT \"CQ_ID\", \"cq1\".\"CQ_DATABASE\", \"cq1\".\"CQ_TABLE\", \"cq1\".\"CQ_PARTITION\"," +
+ " \"CQ_TYPE\", \"CQ_RUN_AS\", \"CQ_HIGHEST_WRITE_ID\", \"CQ_TBLPROPERTIES\"" +
+ " FROM \"COMPACTION_QUEUE\" \"cq1\" " +
+ "INNER JOIN (" +
+ " SELECT MIN(\"CQ_HIGHEST_WRITE_ID\") \"WRITE_ID\", \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\"" +
+ " FROM \"COMPACTION_QUEUE\""
+ + whereClause +
+ " GROUP BY \"CQ_DATABASE\", \"CQ_TABLE\", \"CQ_PARTITION\") \"cq2\" " +
+ "ON \"cq1\".\"CQ_DATABASE\" = \"cq2\".\"CQ_DATABASE\""+
+ " AND \"cq1\".\"CQ_TABLE\" = \"cq2\".\"CQ_TABLE\""+
+ " AND (\"cq1\".\"CQ_PARTITION\" = \"cq2\".\"CQ_PARTITION\"" +
+ " OR \"cq1\".\"CQ_PARTITION\" IS NULL AND \"cq2\".\"CQ_PARTITION\" IS NULL)"
+ + whereClause +
+ " AND \"CQ_HIGHEST_WRITE_ID\" = \"WRITE_ID\"" +
+ " ORDER BY \"CQ_ID\"";
LOG.debug("Going to execute query <" + s + ">");
- rs = stmt.executeQuery(s);
- while (rs.next()) {
- CompactionInfo info = new CompactionInfo();
- info.id = rs.getLong(1);
- info.dbname = rs.getString(2);
- info.tableName = rs.getString(3);
- info.partName = rs.getString(4);
- info.type = dbCompactionType2ThriftType(rs.getString(5).charAt(0));
- info.runAs = rs.getString(6);
- info.highestWriteId = rs.getLong(7);
- if (LOG.isDebugEnabled()) {
- LOG.debug("Found ready to clean: " + info.toString());
+ try (ResultSet rs = stmt.executeQuery(s)) {
+ while (rs.next()) {
+ CompactionInfo info = new CompactionInfo();
+ info.id = rs.getLong(1);
+ info.dbname = rs.getString(2);
+ info.tableName = rs.getString(3);
+ info.partName = rs.getString(4);
+ info.type = dbCompactionType2ThriftType(rs.getString(5).charAt(0));
+ info.runAs = rs.getString(6);
+ info.highestWriteId = rs.getLong(7);
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Found ready to clean: " + info.toString());
+ }
+ rc.add(info);
}
- rc.add(info);
}
return rc;
} catch (SQLException e) {
LOG.error("Unable to select next element for cleaning, " + e.getMessage());
- LOG.debug("Going to rollback");
- rollbackDBConn(dbConn);
Review comment:
this is select, not modifications, meaning nothing to rollback
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[GitHub] [hive] deniskuzZ merged pull request #2825: HIVE-25781: Restore multi-threaded support in Cleaner after HIVE-25115
Posted by GitBox <gi...@apache.org>.
deniskuzZ merged pull request #2825:
URL: https://github.com/apache/hive/pull/2825
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