Examples with GetValidWriteIdsRequest org.apache.hadoop.hive.metastore.api.GetValidWriteIdsRequest used on opensource projects

Example 1 with GetValidWriteIdsRequest

use of org.apache.hadoop.hive.metastore.api.GetValidWriteIdsRequest in project hive by apache.

the class Initiator method run.

@Override
public void run() {
    // so wrap it in a big catch Throwable statement.
    try {
        recoverFailedCompactions(false);
        int abortedThreshold = HiveConf.getIntVar(conf, HiveConf.ConfVars.HIVE_COMPACTOR_ABORTEDTXN_THRESHOLD);
        // HiveMetaStore.
        do {
            long startedAt = -1;
            TxnStore.MutexAPI.LockHandle handle = null;
            // don't doom the entire thread.
            try {
                handle = txnHandler.getMutexAPI().acquireLock(TxnStore.MUTEX_KEY.Initiator.name());
                startedAt = System.currentTimeMillis();
                // todo: add method to only get current i.e. skip history - more efficient
                ShowCompactResponse currentCompactions = txnHandler.showCompact(new ShowCompactRequest());
                Set<CompactionInfo> potentials = txnHandler.findPotentialCompactions(abortedThreshold);
                LOG.debug("Found " + potentials.size() + " potential compactions, " + "checking to see if we should compact any of them");
                for (CompactionInfo ci : potentials) {
                    LOG.info("Checking to see if we should compact " + ci.getFullPartitionName());
                    try {
                        Table t = resolveTable(ci);
                        if (t == null) {
                            // Most likely this means it's a temp table
                            LOG.info("Can't find table " + ci.getFullTableName() + ", assuming it's a temp " + "table or has been dropped and moving on.");
                            continue;
                        }
                        // check if no compaction set for this table
                        if (noAutoCompactSet(t)) {
                            LOG.info("Table " + tableName(t) + " marked " + hive_metastoreConstants.TABLE_NO_AUTO_COMPACT + "=true so we will not compact it.");
                            continue;
                        }
                        // then it's a dynamic partitioning case and we shouldn't check the table itself.
                        if (t.getPartitionKeys() != null && t.getPartitionKeys().size() > 0 && ci.partName == null) {
                            LOG.debug("Skipping entry for " + ci.getFullTableName() + " as it is from dynamic" + " partitioning");
                            continue;
                        }
                        // the time currentCompactions is generated and now
                        if (lookForCurrentCompactions(currentCompactions, ci)) {
                            LOG.debug("Found currently initiated or working compaction for " + ci.getFullPartitionName() + " so we will not initiate another compaction");
                            continue;
                        }
                        if (txnHandler.checkFailedCompactions(ci)) {
                            LOG.warn("Will not initiate compaction for " + ci.getFullPartitionName() + " since last " + HiveConf.ConfVars.COMPACTOR_INITIATOR_FAILED_THRESHOLD + " attempts to compact it failed.");
                            txnHandler.markFailed(ci);
                            continue;
                        }
                        // Figure out who we should run the file operations as
                        Partition p = resolvePartition(ci);
                        if (p == null && ci.partName != null) {
                            LOG.info("Can't find partition " + ci.getFullPartitionName() + ", assuming it has been dropped and moving on.");
                            continue;
                        }
                        // Compaction doesn't work under a transaction and hence pass null for validTxnList
                        // The response will have one entry per table and hence we get only one ValidWriteIdList
                        String fullTableName = TxnUtils.getFullTableName(t.getDbName(), t.getTableName());
                        GetValidWriteIdsRequest rqst = new GetValidWriteIdsRequest(Collections.singletonList(fullTableName), null);
                        ValidWriteIdList tblValidWriteIds = TxnUtils.createValidCompactWriteIdList(txnHandler.getValidWriteIds(rqst).getTblValidWriteIds().get(0));
                        StorageDescriptor sd = resolveStorageDescriptor(t, p);
                        String runAs = findUserToRunAs(sd.getLocation(), t);
                        /*Future thought: checkForCompaction will check a lot of file metadata and may be expensive.
              * Long term we should consider having a thread pool here and running checkForCompactionS
              * in parallel*/
                        CompactionType compactionNeeded = checkForCompaction(ci, tblValidWriteIds, sd, t.getParameters(), runAs);
                        if (compactionNeeded != null)
                            requestCompaction(ci, runAs, compactionNeeded);
                    } catch (Throwable t) {
                        LOG.error("Caught exception while trying to determine if we should compact " + ci + ".  Marking failed to avoid repeated failures, " + "" + StringUtils.stringifyException(t));
                        txnHandler.markFailed(ci);
                    }
                }
                // Check for timed out remote workers.
                recoverFailedCompactions(true);
                // Clean anything from the txns table that has no components left in txn_components.
                txnHandler.cleanEmptyAbortedTxns();
            } catch (Throwable t) {
                LOG.error("Initiator loop caught unexpected exception this time through the loop: " + StringUtils.stringifyException(t));
            } finally {
                if (handle != null) {
                    handle.releaseLocks();
                }
            }
            long elapsedTime = System.currentTimeMillis() - startedAt;
            if (elapsedTime >= checkInterval || stop.get())
                continue;
            else
                Thread.sleep(checkInterval - elapsedTime);
        } while (!stop.get());
    } catch (Throwable t) {
        LOG.error("Caught an exception in the main loop of compactor initiator, exiting " + StringUtils.stringifyException(t));
    }
}

Example 2 with GetValidWriteIdsRequest

use of org.apache.hadoop.hive.metastore.api.GetValidWriteIdsRequest in project hive by apache.

the class Worker method run.

// todo: this doesn;t check if compaction is already running (even though Initiator does but we
// don't go  through Initiator for user initiated compactions)
@Override
public void run() {
    do {
        boolean launchedJob = false;
        // so wrap it in a big catch Throwable statement.
        try {
            final CompactionInfo ci = txnHandler.findNextToCompact(name);
            if (ci == null && !stop.get()) {
                try {
                    Thread.sleep(SLEEP_TIME);
                    continue;
                } catch (InterruptedException e) {
                    LOG.warn("Worker thread sleep interrupted " + e.getMessage());
                    continue;
                }
            }
            // Find the table we will be working with.
            Table t1 = null;
            try {
                t1 = resolveTable(ci);
                if (t1 == null) {
                    LOG.info("Unable to find table " + ci.getFullTableName() + ", assuming it was dropped and moving on.");
                    txnHandler.markCleaned(ci);
                    continue;
                }
            } catch (MetaException e) {
                txnHandler.markCleaned(ci);
                continue;
            }
            // This chicanery is to get around the fact that the table needs to be final in order to
            // go into the doAs below.
            final Table t = t1;
            // Find the partition we will be working with, if there is one.
            Partition p = null;
            try {
                p = resolvePartition(ci);
                if (p == null && ci.partName != null) {
                    LOG.info("Unable to find partition " + ci.getFullPartitionName() + ", assuming it was dropped and moving on.");
                    txnHandler.markCleaned(ci);
                    continue;
                }
            } catch (Exception e) {
                txnHandler.markCleaned(ci);
                continue;
            }
            // Find the appropriate storage descriptor
            final StorageDescriptor sd = resolveStorageDescriptor(t, p);
            // Check that the table or partition isn't sorted, as we don't yet support that.
            if (sd.getSortCols() != null && !sd.getSortCols().isEmpty()) {
                LOG.error("Attempt to compact sorted table, which is not yet supported!");
                txnHandler.markCleaned(ci);
                continue;
            }
            final boolean isMajor = ci.isMajorCompaction();
            // Compaction doesn't work under a transaction and hence pass 0 for current txn Id
            // The response will have one entry per table and hence we get only one OpenWriteIds
            String fullTableName = TxnUtils.getFullTableName(t.getDbName(), t.getTableName());
            GetValidWriteIdsRequest rqst = new GetValidWriteIdsRequest(Collections.singletonList(fullTableName), null);
            final ValidWriteIdList tblValidWriteIds = TxnUtils.createValidCompactWriteIdList(txnHandler.getValidWriteIds(rqst).getTblValidWriteIds().get(0));
            LOG.debug("ValidCompactWriteIdList: " + tblValidWriteIds.writeToString());
            txnHandler.setCompactionHighestWriteId(ci, tblValidWriteIds.getHighWatermark());
            final StringBuilder jobName = new StringBuilder(name);
            jobName.append("-compactor-");
            jobName.append(ci.getFullPartitionName());
            // Determine who to run as
            String runAs;
            if (ci.runAs == null) {
                runAs = findUserToRunAs(sd.getLocation(), t);
                txnHandler.setRunAs(ci.id, runAs);
            } else {
                runAs = ci.runAs;
            }
            LOG.info("Starting " + ci.type.toString() + " compaction for " + ci.getFullPartitionName());
            final StatsUpdater su = StatsUpdater.init(ci, txnHandler.findColumnsWithStats(ci), conf, runJobAsSelf(runAs) ? runAs : t.getOwner());
            final CompactorMR mr = new CompactorMR();
            launchedJob = true;
            try {
                if (runJobAsSelf(runAs)) {
                    mr.run(conf, jobName.toString(), t, sd, tblValidWriteIds, ci, su, txnHandler);
                } else {
                    UserGroupInformation ugi = UserGroupInformation.createProxyUser(t.getOwner(), UserGroupInformation.getLoginUser());
                    ugi.doAs(new PrivilegedExceptionAction<Object>() {

                        @Override
                        public Object run() throws Exception {
                            mr.run(conf, jobName.toString(), t, sd, tblValidWriteIds, ci, su, txnHandler);
                            return null;
                        }
                    });
                    try {
                        FileSystem.closeAllForUGI(ugi);
                    } catch (IOException exception) {
                        LOG.error("Could not clean up file-system handles for UGI: " + ugi + " for " + ci.getFullPartitionName(), exception);
                    }
                }
                txnHandler.markCompacted(ci);
                if (conf.getBoolVar(HiveConf.ConfVars.HIVE_IN_TEST)) {
                    mrJob = mr.getMrJob();
                }
            } catch (Exception e) {
                LOG.error("Caught exception while trying to compact " + ci + ".  Marking failed to avoid repeated failures, " + StringUtils.stringifyException(e));
                txnHandler.markFailed(ci);
            }
        } catch (Throwable t) {
            LOG.error("Caught an exception in the main loop of compactor worker " + name + ", " + StringUtils.stringifyException(t));
        }
        // a bit before we restart the loop.
        if (!launchedJob && !stop.get()) {
            try {
                Thread.sleep(SLEEP_TIME);
            } catch (InterruptedException e) {
            }
        }
    } while (!stop.get());
}