Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/15285#discussion_r83811950
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -1448,14 +1452,70 @@ private[spark] object Utils extends Logging {
CallSite(shortForm, longForm)
}
+ val UNCOMPRESSED_LOG_FILE_LENGTH_CACHE_SIZE =
"spark.worker.ui.compressedLogFileLengthCacheSize"
+ val DEFAULT_UNCOMPRESSED_LOG_FILE_LENGTH_CACHE_SIZE = 100
+ private var compressedLogFileLengthCache: LoadingCache[String,
java.lang.Long] = null
+ private def getCompressedLogFileLengthCache(
+ sparkConf: SparkConf): LoadingCache[String, java.lang.Long] =
this.synchronized {
+ if (compressedLogFileLengthCache == null) {
+ val compressedLogFileLengthCacheSize = sparkConf.getInt(
+ UNCOMPRESSED_LOG_FILE_LENGTH_CACHE_SIZE,
+ DEFAULT_UNCOMPRESSED_LOG_FILE_LENGTH_CACHE_SIZE)
+ compressedLogFileLengthCache = CacheBuilder.newBuilder()
+ .maximumSize(compressedLogFileLengthCacheSize)
+ .build[String, java.lang.Long](new CacheLoader[String,
java.lang.Long]() {
+ override def load(path: String): java.lang.Long = {
+ Utils.getFileLength(new File(path))
+ }
+ })
+ }
+ compressedLogFileLengthCache
+ }
+
+ def getFileLength(file: File, sparkConf: SparkConf): Long = {
+ if (file.getName.endsWith(".gz")) {
+ getCompressedLogFileLengthCache(sparkConf).get(file.getAbsolutePath)
+ } else {
+ getFileLength(file)
+ }
+ }
+
+ /** Return the file length, if the file is compressed it returns the
uncompressed file length. */
+ private[util] def getFileLength(file: File): Long = {
+ try {
+ // Uncompress .gz file to determine file size.
+ if (file.getName.endsWith(".gz")) {
+ var fileSize = 0L
+ val gzInputStream = new GZIPInputStream(new FileInputStream(file))
+ val bufSize = 1024
+ val buf = new Array[Byte](bufSize)
+ var numBytes = IOUtils.read(gzInputStream, buf)
+ while (numBytes > 0) {
+ fileSize += numBytes
+ numBytes = IOUtils.read(gzInputStream, buf)
+ }
+ fileSize
+ } else {
+ file.length
+ }
+ } catch {
+ case e: Throwable =>
+ logWarning(s"Cannot get file length of ${file}", e)
--- End diff --
Actually, this is a critical error. Better to make this logError
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