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index.js
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/*
Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
Licensed under the Amazon Software License (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at
http://aws.amazon.com/asl/
or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, express or implied. See the License for the specific language governing permissions and limitations under the License.
*/
var debug = (process.env['DEBUG'] === 'true');
var log_level = process.env['LOG_LEVEL'] || 'info';
var pjson = require('./package.json');
var region = process.env['AWS_REGION'];
if (!region || region === null || region === "") {
region = "us-east-1";
console.log("AWS Lambda Redshift Database Loader using default region " + region);
}
var aws = require('aws-sdk');
aws.config.update({
region: region
});
var https_proxy = process.env['https_proxy'];
if (https_proxy !== undefined && https_proxy !== "") {
console.log("Using proxy server " + https_proxy);
var proxy_agent = require('https-proxy-agent');
aws.config.update({
httpOptions: {agent: new proxy_agent(https_proxy)}
});
}
var s3 = new aws.S3({
apiVersion: '2006-03-01',
region: region
});
var dynamoDB = new aws.DynamoDB({
apiVersion: '2012-08-10',
region: region
});
var sns = new aws.SNS({
apiVersion: '2010-03-31',
region: region
});
require('./constants');
var kmsCrypto = require('./kmsCrypto');
kmsCrypto.setRegion(region);
var common = require('./common');
var async = require('async');
var uuid = require('uuid');
const {Client} = require('pg');
const maxRetryMS = 200;
const winston = require('winston');
const logger = winston.createLogger({
level: debug === true ? 'debug' : log_level,
transports: [
new winston.transports.Console({
format: winston.format.simple()
})
]
});
// empty import/invocation of the keepalive fix for node-postgres module
require('pg-ka-fix')();
var upgrade = require('./upgrades');
String.prototype.shortenPrefix = function () {
var tokens = this.split("/");
if (tokens && tokens.length > 0) {
return tokens.slice(0, tokens.length - 1).join("/");
}
};
String.prototype.transformHiveStylePrefix = function () {
// transform hive style dynamic prefixes into static
// match prefixes
var tokeniseSearchKey = this.split('/');
var regex = /\=(.*)/;
var processedTokens = tokeniseSearchKey.map(function (item) {
if (item) {
return item.replace(regex, "=*");
}
});
return processedTokens.join('/');
};
function getConfigWithRetry(prefix, callback) {
var proceed = false;
var lookupConfigTries = 10;
var tryNumber = 0;
var configData = null;
var dynamoLookup = {
Key: {
s3Prefix: {
S: prefix
}
},
TableName: configTable,
ConsistentRead: true
};
logger.debug(JSON.stringify(dynamoLookup));
async.whilst(function (test_cb) {
// return OK if the proceed flag has been set, or if
// we've hit the retry count
test_cb(null, !proceed && tryNumber < lookupConfigTries);
}, function (callback) {
tryNumber++;
logger.debug("Fetching S3 Configuration: Try " + tryNumber);
// lookup the configuration item, and run foundConfig on completion
dynamoDB.getItem(dynamoLookup, function (err, data) {
if (err) {
if (err.code === provisionedThroughputExceeded) {
// sleep for bounded jitter time up to 1
// second and then retry
var timeout = common.randomInt(0, 1000);
logger.info(provisionedThroughputExceeded + " while accessing " + configTable + ". Retrying in " + timeout + " ms");
setTimeout(callback, timeout);
} else {
// some other error - call the error callback
callback(err);
}
} else {
configData = data;
proceed = true;
callback(null);
}
});
}, function (err) {
if (err) {
logger.error(err);
callback(err);
} else {
callback(null, configData);
}
});
};
exports.getConfigWithRetry = getConfigWithRetry;
function resolveConfig(prefix, successCallback, noConfigFoundCallback) {
var searchPrefix = prefix;
var config;
async.until(function (test_cb) {
// run until we have found a configuration item, or the search
// prefix is undefined due to the shortening being completed
test_cb(null, config || !searchPrefix);
}, function (untilCallback) {
// query for the prefix, implementing a reduce by '/' each time,
// such that we load the most specific config first
logger.debug("Extracting S3 Config for Path: " + searchPrefix);
getConfigWithRetry(searchPrefix, function (err, data) {
if (err) {
untilCallback(err);
} else {
if (data.Item) {
// set the config = this will cause the 'until' to complete
config = data;
} else {
// reduce the search prefix by one prefix item
searchPrefix = searchPrefix.shortenPrefix();
}
untilCallback();
}
});
}, function (err) {
if (err) {
noConfigFoundCallback(err)
} else {
if (config) {
successCallback(err, config);
} else {
noConfigFoundCallback(err);
}
}
});
};
exports.resolveConfig = resolveConfig;
// main function for AWS Lambda
function handler(event, context) {
/** runtime functions * */
/*
* Function which performs all version upgrades over time - must be able to
* do a forward migration from any version to 'current' at all times!
*/
function upgradeConfig(s3Info, currentConfig, callback) {
// v 1.x to 2.x upgrade for multi-cluster loaders
if (currentConfig.version !== pjson.version) {
logger.debug(`Performing version upgrade from ${currentConfig.version} to ${pjson.version}`);
upgrade.upgradeAll(dynamoDB, s3Info, currentConfig, callback);
} else {
// no upgrade needed
callback(null, s3Info, currentConfig);
}
}
/* callback run when we find a configuration for load in Dynamo DB */
function foundConfig(s3Info, err, data) {
if (err) {
logger.error(err);
var msg = `Error getting Redshift Configuration for ${s3Info.prefix} from DynamoDB`;
logger.error(msg);
context.done(error, msg);
}
logger.info(`Found Redshift Load Configuration for ${s3Info.prefix}`);
var config = data.Item;
var thisBatchId = config.currentBatch.S;
// run all configuration upgrades required
upgradeConfig(s3Info, config, function (err, s3Info, useConfig) {
if (err) {
console.error(JSON.stringify(err));
context.done(error, JSON.stringify(err));
} else {
if (useConfig.filenameFilterRegex) {
var isFilterRegexMatch = true;
try {
isFilterRegexMatch = s3Info.key.match(useConfig.filenameFilterRegex.S);
} catch (e) {
// suppress this error - it may have been a malformed
// regex as well as just a non-match
// exceptions are treated as a file match here - we'd
// rather process a file and have the batch
// fail than erroneously ignore it
logger.error("Error on filename filter evaluation. File will be included for processing");
logger.error(e);
}
if (isFilterRegexMatch) {
checkFileProcessed(useConfig, thisBatchId, s3Info);
} else {
logger.info('Object ' + s3Info.key + ' excluded by filename filter \'' + useConfig.filenameFilterRegex.S + '\'');
// scan the current batch to decide if it needs to be
// flushed due to batch timeout
processPendingBatch(useConfig, thisBatchId, s3Info);
}
} else {
// no filter, so we'll load the data
checkFileProcessed(useConfig, thisBatchId, s3Info);
}
}
});
};
/*
* function to add a file to the pending batch set and then call the success
* callback
*/
function checkFileProcessed(config, thisBatchId, s3Info) {
var itemEntry = s3Info.bucket + '/' + s3Info.key;
// perform the idempotency check for the file before we put it
// into a manifest
var fileEntry = {
Key: {
loadFile: {
S: itemEntry
}
},
TableName: filesTable,
ExpressionAttributeNames: {
"#rcvDate": "receiveDateTime"
},
ExpressionAttributeValues: {
":rcvDate": {
S: common.readableTime(common.now())
},
":incr": {
N: "1"
}
},
UpdateExpression: "set #rcvDate = :rcvDate add timesReceived :incr",
ReturnValues: "ALL_NEW"
};
logger.debug("Checking whether File is already processed");
logger.debug(JSON.stringify(fileEntry));
// add the file to the processed list
dynamoDB.updateItem(fileEntry, function (err, data) {
var msg;
if (err) {
msg = "Error " + err.code + " for " + fileEntry;
logger.error(msg);
context.done(error, msg);
} else {
if (!data) {
msg = "Update failed to return data from Processed File Check";
logger.error(msg);
context.done(error, msg);
} else {
if (data.Attributes.batchId && data.Attributes.batchId.S) {
// there's already a pending batch link, so this is a
// full duplicate and we'll discard
logger.info("File " + itemEntry + " Already Processed");
context.done(null, null);
} else {
// update was successful, and either this is the first
// event and there was no batch ID
// specified, or the file is a reprocess but the batch
// ID attachment didn't work - proceed
// with adding the entry to the pending batch
addFileToPendingBatch(config, thisBatchId, s3Info, itemEntry);
}
}
}
});
};
/**
* Function run to add a file to the existing open batch. This will
* repeatedly try to write and if unsuccessful it will requery the batch ID
* on the configuration
*/
function addFileToPendingBatch(config, thisBatchId, s3Info, itemEntry) {
console.log("Adding Pending Batch Entry for " + itemEntry);
var proceed = false;
var asyncError;
var addFileRetryLimit = 100;
var tryNumber = 0;
var configReloads = 0;
async.whilst(
function (test_cb) {
// return OK if the proceed flag has been set, or if we've hit
// the retry count
test_cb(null, !proceed && tryNumber < addFileRetryLimit);
},
function (callback) {
tryNumber++;
// build the reference to the pending batch, with an atomic add
// of the current file
var now = common.now();
var item = {
Key: {
batchId: {
S: thisBatchId
},
s3Prefix: {
S: s3Info.prefix
}
},
TableName: batchTable,
UpdateExpression: "add entries :entry, writeDates :appendFileDate, size :size set #stat = :open, lastUpdate = :updateTime",
ExpressionAttributeNames: {
"#stat": 'status'
},
ExpressionAttributeValues: {
":entry": {
SS: [itemEntry]
},
":appendFileDate": {
NS: ['' + now]
},
":updateTime": {
N: '' + now
},
":open": {
S: open
},
":size": {
N: '' + s3Info.size
}
},
/*
* current batch can't be locked
*/
ConditionExpression: "#stat = :open or attribute_not_exists(#stat)"
};
// add the file to the pending batch
dynamoDB.updateItem(item, function (err, data) {
if (err) {
let waitFor = Math.min(Math.pow(tryNumber, 2) * 10, maxRetryMS);
if (err.code === provisionedThroughputExceeded) {
logger.warn("Provisioned Throughput Exceeded on addition of " + s3Info.prefix + " to pending batch " + thisBatchId + ". Trying again in " + waitFor + " ms");
setTimeout(callback, waitFor);
} else if (err.code === conditionCheckFailed) {
// the batch I have a reference to was locked so
// reload the current batch ID from the config
var configReloadRequest = {
Key: {
s3Prefix: {
S: s3Info.prefix
}
},
TableName: configTable,
/*
* we need a consistent read here to ensure we
* get the latest batch ID
*/
ConsistentRead: true
};
dynamoDB.getItem(configReloadRequest, function (err, data) {
configReloads++;
if (err) {
if (err === provisionedThroughputExceeded) {
logger.warn("Provisioned Throughput Exceeded on reload of " + configTable + " due to locked batch write");
callback();
} else {
console.log(err);
callback(err);
}
} else {
if (data.Item.currentBatch.S === thisBatchId) {
// we've obtained the same batch ID back
// from the configuration as we have
// now, meaning it hasn't yet rotated
logger.warn("Batch " + thisBatchId + " still current after configuration reload attempt " + configReloads + ". Recycling in " + waitFor + " ms.");
// because the batch hasn't been
// reloaded on the configuration, we'll
// backoff here for a moment to let that
// happen
setTimeout(callback, waitFor);
} else {
// we've got an updated batch id, so use
// this in the next cycle of file add
thisBatchId = data.Item.currentBatch.S;
logger.warn("Obtained new Batch ID " + thisBatchId + " after configuration reload. Attempt " + configReloads);
/*
* callback immediately, as we should
* now have a valid and open batch to
* use
*/
callback();
}
}
});
} else {
asyncError = err;
proceed = true;
callback();
}
} else {
// no error - the file was added to the batch, so mark
// the operation as OK so async will not retry
proceed = true;
callback();
}
});
},
function (err) {
if (err) {
// throw presented errors
logger.error(JSON.stringify(err));
context.done(error, JSON.stringify(err));
} else {
if (asyncError) {
/*
* throw errors which were encountered during the async
* calls
*/
logger.error(JSON.stringify(asyncError));
context.done(error, JSON.stringify(asyncError));
} else {
if (!proceed) {
/*
* process what happened if the iterative request to
* write to the open pending batch timed out
*
* TODO Can we force a rotation of the current batch
* at this point?
*/
var e = "Unable to write "
+ itemEntry
+ " in "
+ addFileRetryLimit
+ " attempts. Failing further processing to Batch "
+ thisBatchId
+ " which may be stuck in '"
+ locked
+ "' state. If so, unlock the back using `node unlockBatch.js <batch ID>`, delete the processed file marker with `node processedFiles.js -d <filename>`, and then re-store the file in S3";
logger.error(e);
var msg = "Lambda Redshift Loader unable to write to Open Pending Batch";
if (config.failureTopicARN) {
sendSNS(config.failureTopicARN.S, msg, e, function () {
context.done(error, e);
}, function (err) {
logger.error(err);
context.done(error, "Unable to Send SNS Notification");
});
} else {
logger.error("Unable to send failure notifications");
logger.error(msg);
context.done(error, msg);
}
} else {
// the add of the file was successful,
// so we
linkProcessedFileToBatch(itemEntry, thisBatchId);
// which is async, so may fail but we'll
// still sweep
// the pending batch
processPendingBatch(config, thisBatchId, s3Info);
}
}
}
});
};
/**
* Function which will link the deduplication table entry for the file to
* the batch into which the file was finally added
*/
function linkProcessedFileToBatch(itemEntry, batchId) {
var updateProcessedFile = {
Key: {
loadFile: {
S: itemEntry
}
},
TableName: filesTable,
AttributeUpdates: {
batchId: {
Action: 'PUT',
Value: {
S: batchId
}
}
}
};
logger.debug("Linking file to current batch");
logger.debug(JSON.stringify(updateProcessedFile));
common.retryableUpdate(dynamoDB, updateProcessedFile, function (err, data) {
// because this is an async call which doesn't affect
// process flow, we'll just log the error and do nothing with the OK
// response
if (err) {
logger.error(err);
}
});
};
/**
* Function which links the manifest name used to load redshift onto the
* batch table entry
*/
function addManifestToBatch(config, thisBatchId, s3Info, manifestInfo) {
// build the reference to the pending batch, with an atomic
// add of the current file
var item = {
Key: {
batchId: {
S: thisBatchId
},
s3Prefix: {
S: s3Info.prefix
}
},
TableName: batchTable,
AttributeUpdates: {
manifestFile: {
Action: 'PUT',
Value: {
S: manifestInfo.manifestPath
}
},
lastUpdate: {
Action: 'PUT',
Value: {
N: '' + common.now()
}
}
}
};
logger.debug("Linking manifest file pointer to Batch");
logger.debug(JSON.stringify(item));
common.retryableUpdate(dynamoDB, item, function (err, data) {
if (err) {
logger.error(err);
} else {
logger.info("Linked Manifest " + manifestInfo.manifestName + " to Batch " + thisBatchId);
}
});
};
/**
* Function to process the current pending batch, and create a batch load
* process if required on the basis of size or timeout
*/
function processPendingBatch(config, thisBatchId, s3Info) {
// make the request for the current batch
var currentBatchRequest = {
Key: {
batchId: {
S: thisBatchId
},
s3Prefix: {
S: s3Info.prefix
}
},
TableName: batchTable,
ConsistentRead: true
};
logger.debug("Loading current Batch record from prefix config");
logger.debug(JSON.stringify(currentBatchRequest));
dynamoDB.getItem(currentBatchRequest, function (err, data) {
if (err) {
if (err === provisionedThroughputExceeded) {
logger.warn("Provisioned Throughput Exceeded on read of " + batchTable);
callback();
} else {
logger.error(JSON.stringify(err));
context.done(error, JSON.stringify(err));
}
} else if (!data || !data.Item) {
var msg = "No open pending Batch " + thisBatchId;
logger.error(msg);
context.done(null, msg);
} else {
// first step is to resolve the earliest writeDate as the batch
// creation date
var batchCreateDate;
data.Item.writeDates.NS.map(function (item) {
var t = parseInt(item);
logger.debug(`Batch entry epoch timestamp: ${item}`);
if (!batchCreateDate || t < batchCreateDate) {
batchCreateDate = t;
}
});
var lastUpdateTime = data.Item.lastUpdate.N;
var pendingEntries = data.Item.entries.SS;
var doProcessBatch = false;
if (!pendingEntries || pendingEntries.length >= parseInt(config.batchSize.N)) {
logger.info("Batch count " + config.batchSize.N + " reached");
doProcessBatch = true;
} else {
if (config.batchSize && config.batchSize.N) {
logger.debug("Current batch count of " + pendingEntries.length + " below batch limit of " + config.batchSize.N);
}
}
// check whether the current batch is bigger than the configured
// max count, size, or older than configured max age
if (config.batchTimeoutSecs && config.batchTimeoutSecs.N && pendingEntries.length > 0 && common.now() - batchCreateDate > parseInt(config.batchTimeoutSecs.N)) {
logger.info("Batch age " + config.batchTimeoutSecs.N + " seconds reached");
doProcessBatch = true;
} else {
if (config.batchTimeoutSecs && config.batchTimeoutSecs.N) {
logger.debug("Current batch age of " + (common.now() - batchCreateDate) + " seconds below batch timeout: "
+ (config.batchTimeoutSecs.N ? config.batchTimeoutSecs.N : "None Defined"));
}
}
if (config.batchSizeBytes && config.batchSizeBytes.N && pendingEntries.length > 0 && parseInt(config.batchSizeBytes.N) <= parseInt(data.Item.size.N)) {
logger.info("Batch size " + config.batchSizeBytes.N + " bytes reached");
doProcessBatch = true;
} else {
if (data.Item.size.N) {
logger.debug("Current batch size of " + data.Item.size.N + " below batch threshold or not configured");
}
}
if (doProcessBatch) {
// set the current batch to locked status
var updateCurrentBatchStatus = {
Key: {
batchId: {
S: thisBatchId
},
s3Prefix: {
S: s3Info.prefix
}
},
TableName: batchTable,
AttributeUpdates: {
status: {
Action: 'PUT',
Value: {
S: locked
}
},
lastUpdate: {
Action: 'PUT',
Value: {
N: '' + common.now()
}
}
},
/*
* the batch to be processed has to be 'open', otherwise
* we'll have multiple processes all handling a single
* batch
*/
Expected: {
status: {
AttributeValueList: [{
S: open
}],
ComparisonOperator: 'EQ'
}
},
/*
* add the ALL_NEW return values so we have the most up
* to date version of the entries string set
*/
ReturnValues: "ALL_NEW"
};
logger.debug("Attempting to lock Batch for processing");
logger.debug(JSON.stringify(updateCurrentBatchStatus));
common.retryableUpdate(dynamoDB, updateCurrentBatchStatus, function (err, data) {
if (err) {
if (err.code === conditionCheckFailed) {
// some other Lambda function has locked the
// batch - this is OK and we'll just exit
// quietly
logger.debug("Batch is ready to be processed, but another thread has locked it for loading");
context.done(null, null);
} else if (err.code === provisionedThroughputExceeded) {
logger.error("Provisioned Throughput Exceeded on " + batchTable + " while trying to lock Batch");
context.done(error, JSON.stringify(err));
} else {
logger.error("Unhandled exception while trying to lock Batch " + thisBatchId);
logger.error(JSON.stringify(err));
context.done(error, JSON.stringify(err));
}
} else {
if (!data || !data.Attributes) {
var e = "Unable to extract latest pending entries set from Locked batch";
logger.error(e);
context.done(error, e);
} else {
/*
* grab the pending entries from the locked
* batch
*/
pendingEntries = data.Attributes.entries.SS;
/*
* assign the loaded configuration a new batch
* ID
*/
var allocateNewBatchRequest = {
Key: {
s3Prefix: {
S: s3Info.prefix
}
},
TableName: configTable,
AttributeUpdates: {
currentBatch: {
Action: 'PUT',
Value: {
S: uuid.v4()
}
},
lastBatchRotation: {
Action: 'PUT',
Value: {
S: common.getFormattedDate()
}
}
}
};
logger.debug("Allocating new Batch ID for future processing");
logger.debug(JSON.stringify(allocateNewBatchRequest));
common.retryableUpdate(dynamoDB, allocateNewBatchRequest, function (err, data) {
if (err) {
logger.error("Error while allocating new Pending Batch ID");
logger.error(JSON.stringify(err));
context.done(error, JSON.stringify(err));
} else {
// OK - let's create the manifest file
createManifest(config, thisBatchId, s3Info, pendingEntries);
}
});
}
}
});
} else {
logger.info("No pending batch flush required");
context.done(null, null);
}
}
});
};
/**
* Function which will create the manifest for a given batch and entries
*/
function createManifest(config, thisBatchId, s3Info, batchEntries) {
logger.info("Creating Manifest for Batch " + thisBatchId);
var manifestInfo = common.createManifestInfo(config);
// create the manifest file for the file to be loaded
var manifestContents = {
entries: []
};
logger.debug("Building new COPY Manifest");
for (var i = 0; i < batchEntries.length; i++) {
/*
* fix url encoding for files with spaces. Space values come in from
* Lambda with '+' and plus values come in as %2B. Redshift wants
* the original S3 value
*/
u = 's3://' + batchEntries[i].replace(/\+/g, ' ').replace(/%2B/g, '+')
logger.debug(u);
manifestContents.entries.push({
url: u,
mandatory: true
});
}
var s3PutParams = {
Bucket: manifestInfo.manifestBucket,
Key: manifestInfo.manifestPrefix,
Body: JSON.stringify(manifestContents)
};
logger.info("Writing manifest to " + manifestInfo.manifestBucket + "/" + manifestInfo.manifestPrefix);
/*
* save the manifest file to S3 and build the rest of the copy command
* in the callback letting us know that the manifest was created
* correctly
*/
s3.putObject(s3PutParams, loadRedshiftWithManifest.bind(undefined, config, thisBatchId, s3Info, manifestInfo));
};
/**
* Function run when the Redshift manifest write completes succesfully
*/
function loadRedshiftWithManifest(config, thisBatchId, s3Info, manifestInfo, err, data) {
if (err) {
logger.error("Error on Manifest Creation");
logger.error(err);
failBatch(err, config, thisBatchId, s3Info, manifestInfo);
} else {
logger.info("Created Manifest " + manifestInfo.manifestPath + " Successfully");
// add the manifest file to the batch - this will NOT stop
// processing if it fails
addManifestToBatch(config, thisBatchId, s3Info, manifestInfo);
// convert the config.loadClusters list into a format that
// looks like a native dynamo entry
var clustersToLoad = [];
for (var i = 0; i < config.loadClusters.L.length; i++) {
clustersToLoad[clustersToLoad.length] = config.loadClusters.L[i].M;
}
logger.info("Loading " + clustersToLoad.length + " Clusters");
// run all the cluster loaders in parallel
async.map(clustersToLoad, function (item, callback) {
// call the load cluster function, passing it the continuation
// callback
loadCluster(config, thisBatchId, s3Info, manifestInfo, item, callback);
}, function (err, results) {
if (err) {
logger.error(err);
}
// go through all the results - if they were all
// OK, then close the batch OK - otherwise fail
var allOK = true;
var loadState = {};
for (var i = 0; i < results.length; i++) {
if (!results[i] || results[i].status === ERROR) {
allOK = false;
logger.error("Cluster Load Failure " + results[i].error + " on Cluster " + results[i].cluster);
}
// log the response state for each cluster
loadState[results[i].cluster] = {
status: results[i].status,
error: results[i].error
};
}
var loadStateRequest = {
Key: {
batchId: {
S: thisBatchId
},
s3Prefix: {
S: s3Info.prefix
}
},
TableName: batchTable,
AttributeUpdates: {
clusterLoadStatus: {
Action: 'PUT',
Value: {
S: JSON.stringify(loadState)
}
},
lastUpdate: {
Action: 'PUT',
Value: {
N: '' + common.now()
}
}
}
};
logger.debug("Linking Batch load state for cluster");
logger.debug(JSON.stringify(loadStateRequest));
common.retryableUpdate(dynamoDB, loadStateRequest, function (err, data) {
if (err) {
logger.error("Error while attaching per-Cluster Load State");
failBatch(err, config, thisBatchId, s3Info, manifestInfo);
} else {
if (allOK === true) {
// close the batch as OK
closeBatch(null, config, thisBatchId, s3Info, manifestInfo, loadState);
} else {
// close the batch as failure
failBatch(loadState, config, thisBatchId, s3Info, manifestInfo);
}
}
});
});
}
};
/**
* Function which will run a postgres command with retries
*/
function runPgCommand(clusterInfo, client, command, retries, retryableErrorTraps, retryBackoffBaseMs, callback) {
var completed = false;
var retryCount = 0;
var lastError;
async.until(function (test_cb) {
test_cb(null, completed || !retries || retryCount >= retries);
}, function (asyncCallback) {
logger.debug("Performing Database Command:");
logger.debug(command);
client.query(command, function (queryCommandErr, result) {
if (queryCommandErr) {
lastError = queryCommandErr;
// check all the included retryable error traps to see if
// this is a retryable error
var retryable = false;
if (retryableErrorTraps) {
retryableErrorTraps.map(function (retryableError) {
if (queryCommandErr.detail && queryCommandErr.detail.indexOf(retryableError) > -1) {
retryable = true;
}
});
}
// if the error is not retryable, then fail by calling the
// async callback with the specified error
if (!retryable) {
completed = true;
if (queryCommandErr && queryCommandErr.detail) {
logger.error(queryCommandErr.detail);
}
asyncCallback(queryCommandErr);
} else {
// incre ment the retry count
retryCount += 1;