[pulsar] branch master updated: Add log dir creation in ProcessRuntime (#3114)

[sanjeevrk]

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sanjeevrk pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/pulsar.git


The following commit(s) were added to refs/heads/master by this push:
     new 45b6d73  Add log dir creation in ProcessRuntime (#3114)
45b6d73 is described below

commit 45b6d73ca3c2735ba3df2dbee4bbf70da6eaca5d
Author: Ali Ahmed <alahmed...@gmail.com>
AuthorDate: Tue Dec 4 10:38:09 2018 -0800

    Add log dir creation in ProcessRuntime (#3114)
---
 .../pulsar/functions/runtime/ProcessRuntime.java    | 21 +++++++++++++++++++++
 .../pulsar/functions/runtime/RuntimeUtils.java      | 12 ++++++++----
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git 
a/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/ProcessRuntime.java
 
b/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/ProcessRuntime.java
index 70e7a3a..6a5f79a 100644
--- 
a/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/ProcessRuntime.java
+++ 
b/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/ProcessRuntime.java
@@ -39,6 +39,7 @@ import org.apache.pulsar.functions.proto.InstanceControlGrpc;
 import 
org.apache.pulsar.functions.secretsproviderconfigurator.SecretsProviderConfigurator;
 import org.apache.pulsar.functions.utils.Utils;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.List;
@@ -72,6 +73,7 @@ class ProcessRuntime implements Runtime {
     private final SecretsProviderConfigurator secretsProviderConfigurator;
     private final String extraDependenciesDir;
     private static final long GRPC_TIMEOUT_SECS = 5;
+    private final String funcLogDir;
 
     ProcessRuntime(InstanceConfig instanceConfig,
                    String instanceFile,
@@ -88,6 +90,7 @@ class ProcessRuntime implements Runtime {
         this.metricsPort = Utils.findAvailablePort();
         this.expectedHealthCheckInterval = expectedHealthCheckInterval;
         this.secretsProviderConfigurator = secretsProviderConfigurator;
+        this.funcLogDir = RuntimeUtils.genFunctionLogFolder(logDirectory, 
instanceConfig);
         String logConfigFile = null;
         String secretsProviderClassName = 
secretsProviderConfigurator.getSecretsProviderClassName(instanceConfig.getFunctionDetails());
         String secretsProviderConfig = null;
@@ -133,6 +136,19 @@ class ProcessRuntime implements Runtime {
     @Override
     public void start() {
         java.lang.Runtime.getRuntime().addShutdownHook(new Thread(() -> 
process.destroy()));
+
+        // Note: we create the expected log folder before the function process 
logger attempts to create it
+        // This is because if multiple instances are launched they can 
encounter a race condition creation of the dir.
+        log.info("Creating function log directory {}", funcLogDir);
+        boolean success = createFolder(funcLogDir);
+
+        if (!success) {
+            log.error("Log folder could not be created : {}", funcLogDir);
+            throw new RuntimeException("Log folder creation error");
+        }
+
+        log.info("Created function log directory {}", funcLogDir);
+
         startProcess();
         if (channel == null && stub == null) {
             channel = ManagedChannelBuilder.forAddress("127.0.0.1", 
instancePort)
@@ -332,6 +348,11 @@ class ProcessRuntime implements Runtime {
         return true;
     }
 
+    private boolean createFolder(final String path) {
+        final boolean success = new File(path).mkdirs();
+        return success;
+    }
+
     private void tryExtractingDeathException() {
         InputStream errorStream = process.getErrorStream();
         try {
diff --git 
a/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/RuntimeUtils.java
 
b/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/RuntimeUtils.java
index a5f55c5..5e09e66 100644
--- 
a/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/RuntimeUtils.java
+++ 
b/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/RuntimeUtils.java
@@ -84,10 +84,7 @@ class RuntimeUtils {
                 args.add(String.format("-D%s=%s", 
FUNCTIONS_EXTRA_DEPS_PROPERTY, extraDependenciesDir));
             }
             args.add("-Dlog4j.configurationFile=" + logConfigFile);
-            args.add("-Dpulsar.function.log.dir=" + String.format(
-                    "%s/%s",
-                    logDirectory,
-                    
FunctionDetailsUtils.getFullyQualifiedName(instanceConfig.getFunctionDetails())));
+            args.add("-Dpulsar.function.log.dir=" + 
genFunctionLogFolder(logDirectory, instanceConfig));
             args.add("-Dpulsar.function.log.file=" + String.format(
                     "%s-%s",
                     instanceConfig.getFunctionDetails().getName(),
@@ -194,6 +191,13 @@ class RuntimeUtils {
         return args;
     }
 
+    public static String genFunctionLogFolder(String logDirectory, 
InstanceConfig instanceConfig) {
+        return String.format(
+                "%s/%s",
+                logDirectory,
+                
FunctionDetailsUtils.getFullyQualifiedName(instanceConfig.getFunctionDetails()));
+    }
+
     public static String getPrometheusMetrics(int metricsPort) throws 
IOException{
         StringBuilder result = new StringBuilder();
         URL url = new URL(String.format("http://%s:%s";, 
InetAddress.getLocalHost().getHostAddress(), metricsPort));