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Add support for writing parsed logs to stdout #2

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e366427
Update .gitignore
arunvelsriram Feb 1, 2020
28681aa
Add support for writing parsed logs to stdout
arunvelsriram Feb 1, 2020
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5 changes: 4 additions & 1 deletion .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -2,4 +2,7 @@
.project
dependency-reduced-pom.xml
target
*.log
*.log
.DS_Store
.idea
.settings
2 changes: 2 additions & 0 deletions README.txt
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Expand Up @@ -17,6 +17,8 @@ For HDInsight clusters, just download your logs on your home container located i

Then each of the container logs will be parsed and written to a ".txt" file, along with the original log file.

When -o option is not provided the parsed output will be written to stdout.

[Download and Parse Logs from WASB]
You can also use this tool to directly download Yarn application logs from Azure Storage account associated with an HDInsight cluster.

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5 changes: 1 addition & 4 deletions src/main/java/com/shanyu/hadoop/logparser/LogParser.java
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Expand Up @@ -6,7 +6,6 @@
import java.io.FileWriter;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.File;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
Expand Down Expand Up @@ -44,8 +43,7 @@ public static void main( String[] args )
String.format("WASB Account suffix, defaults to '%s'", DEFAULT_WASB_ACCOUNT_SUFFIX)));
options.addOption(new Option("i", "applicationId", true, "Application ID"));
options.addOption(new Option("d", "localDir", true, "Local Directory Path"));
Option output = new Option("o", "outputDir", true, "Output Directory Name");
output.setRequired(true);
Option output = new Option("o", "outputDir", true, "Output Directory Name (\"-\" prints to stdout)");
options.addOption(output);

CommandLine cmd = null;
Expand Down Expand Up @@ -114,7 +112,6 @@ else if (!isStrEmpty(wasbAccount) && !isStrEmpty(wasbKey) && !isStrEmpty(wasbCon

Path path = new Path(srcPathDir);
FileSystem fs = path.getFileSystem(conf);
new File(outputDir).mkdirs();
TFileParser parser = new TFileParser(conf, fs, outputDir);
FileStatus[] files = fs.listStatus(path);
for(FileStatus file : files) {
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15 changes: 12 additions & 3 deletions src/main/java/com/shanyu/hadoop/logparser/TFileParser.java
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Expand Up @@ -8,6 +8,7 @@
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.File;
import java.io.OutputStream;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
Expand All @@ -32,14 +33,22 @@ public TFileParser(Configuration conf, FileSystem fs, String destLocalFolder) {

void parseOneFile(Path srcPath)
throws FileNotFoundException, IOException {
String destLocalPath = _destLocalFolder + File.separator + srcPath.getName() + ".txt";
System.out.println("===================================");
System.out.println("converting " + srcPath);
System.out.println("writting to " + destLocalPath);
OutputStream outputStream = null;
if(_destLocalFolder == null || _destLocalFolder.equals("") || _destLocalFolder.equals("-")) {
outputStream = System.out;
System.out.println("writting to stdout");
} else {
new File(_destLocalFolder).mkdirs();
String destLocalPath = _destLocalFolder + File.separator + srcPath.getName() + ".txt";
outputStream = new FileOutputStream(destLocalPath);
System.out.println("writting to " + destLocalPath);
}

try (
final FSDataInputStream fsdis = _fs.open(srcPath);
final OutputStreamWriter outWriter = new OutputStreamWriter(new FileOutputStream(destLocalPath), "utf-8");
final OutputStreamWriter outWriter = new OutputStreamWriter(outputStream, "utf-8");
final TFile.Reader reader =
new TFile.Reader(fsdis, _fs.getFileStatus(srcPath).getLen(), _conf);
final TFile.Reader.Scanner scanner = reader.createScanner()
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