Fixed locking statistics files when multiple gradle daemons started

idea/idea-gradle/src/org/jetbrains/kotlin/idea/statistics/KotlinGradleFUSLogger.kt

@@ -175,9 +175,10 @@ class KotlinGradleFUSLogger : StartupActivity, DumbAware, Runnable {
                 try {
                     for (gradleUserHome in gradleUserDirs) {
                         BuildSessionLogger.listProfileFiles(File(gradleUserHome, STATISTICS_FOLDER_NAME))?.forEach { statisticFile ->
+                            var fileWasRead = true
                             try {
                                 var previousEvent: MetricsContainer? = null
-                                MetricsContainer.readFromFile(statisticFile) { metricContainer ->
+                                fileWasRead = MetricsContainer.readFromFile(statisticFile) { metricContainer ->
                                     processMetricsContainer(metricContainer, previousEvent)
                                     previousEvent = metricContainer
                                 }
@@ -185,7 +186,7 @@ class KotlinGradleFUSLogger : StartupActivity, DumbAware, Runnable {
                                 Logger.getInstance(KotlinFUSLogger::class.java)
                                     .info("Failed to process file ${statisticFile.absolutePath}: ${e.message}", e)
                             } finally {
-                                if (!statisticFile.delete()) {
+                                if (fileWasRead && !statisticFile.delete()) {
                                     Logger.getInstance(KotlinFUSLogger::class.java)
                                         .warn("[FUS] Failed to delete file ${statisticFile.absolutePath}")
                                 }

libraries/tools/kotlin-gradle-statistics/src/org/jetbrains/kotlin/statistics/fileloggers/FileRecordLogger.kt

@@ -24,7 +24,7 @@ class FileRecordLogger(file: File) : IRecordLogger {
 
     init {
         lock = try {
-            channel.lock()
+            channel.tryLock() ?: throw IOException("Could not acquire an exclusive lock of file ${file.name}")
         } catch (e: Exception) {
             channel.close()
             // wrap in order to unify with FileOverlappingException

libraries/tools/kotlin-gradle-statistics/src/org/jetbrains/kotlin/statistics/fileloggers/MetricsContainer.kt

@@ -43,9 +43,9 @@ class MetricsContainer : IStatisticsValuesConsumer {
 
         private val numericalMetricsMap = NumericalMetrics.values().associateBy(NumericalMetrics::name)
 
-        fun readFromFile(file: File, consumer: (MetricsContainer) -> Unit) {
+        fun readFromFile(file: File, consumer: (MetricsContainer) -> Unit): Boolean {
             val channel = FileChannel.open(Paths.get(file.toURI()), StandardOpenOption.WRITE, StandardOpenOption.READ)
-            channel.lock()
+            channel.tryLock() ?: return false
 
             val inputStream = Channels.newInputStream(channel)
             try {
@@ -86,6 +86,7 @@ class MetricsContainer : IStatisticsValuesConsumer {
             } finally {
                 channel.close()
             }
+            return true
         }
     }