- Improve error-handling in file-compression.

- Update dependencies.

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '2.7.15'
+    id 'org.springframework.boot' version '2.7.16'
     id 'io.spring.dependency-management' version '1.1.3'
     id 'java'
 }
@@ -44,11 +44,11 @@ dependencies {
     // https://mvnrepository.com/artifact/com.google.code.gson/gson
     implementation 'com.google.code.gson:gson:2.10.1'
 
-    implementation("org.apache.commons:commons-compress:1.23.0") {
+    implementation("org.apache.commons:commons-compress:1.24.0") {
         exclude group: 'com.github.luben', module: 'zstd-jni'
     }
-    implementation 'com.github.luben:zstd-jni:1.5.5-5'  // Even though this is part of the above dependency, the Apache commons rarely updates it, while the zstd team makes improvements very often.
+    implementation 'com.github.luben:zstd-jni:1.5.5-6'  // Even though this is part of the above dependency, the Apache commons rarely updates it, while the zstd team makes improvements very often.
-    // Also, for compressing, we strangely need it, otherwise it does not work.
+    // Also, for compressing, we strangely need it to be explicitly declared independently, otherwise it does not work.
 
     testImplementation 'org.springframework.security:spring-security-test'
     testImplementation "org.springframework.boot:spring-boot-starter-test"

src/main/java/eu/openaire/urls_worker/util/FilesCompressor.java

@@ -12,6 +12,7 @@ import java.io.BufferedOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
@@ -85,7 +86,9 @@ public class FilesCompressor {
             }
         }
 
-        if ( numTarredFiles != filesToTar.size() )
+        if ( numTarredFiles == 0 ) {
+            throw new RuntimeException("None of the requested (" + filesToTar.size() + ") could be tarred, for assignments_" + assignmentsCounter + ", batch_" + tarBatchCounter);
+        } else if ( numTarredFiles != filesToTar.size() )
             logger.warn("The number of \"numTarredFiles\" (" + numTarredFiles + ") is different from the number of files requested to be tarred (" + filesToTar.size() + "), for assignments_" + assignmentsCounter + ", batch_" + tarBatchCounter);
             // Still, some files may have been tarred, so we move on. It's up to the Controller, to handle such case.
 
@@ -98,8 +101,7 @@ public class FilesCompressor {
         boolean shouldCloseEntry = false;   // Useful in order to know if we should close the entry (an Exception may appear when initializing the stream, and so we should not try to close it).
 
         Path fullFileNamePath = Paths.get(baseDir + fileName);
-        try ( BufferedInputStream fis = new BufferedInputStream(Files.newInputStream(fullFileNamePath), bufferSize) )
+        try ( BufferedInputStream fis = new BufferedInputStream(Files.newInputStream(fullFileNamePath), bufferSize) ) {
-        {
             TarArchiveEntry entry = new TarArchiveEntry(fileName);
             entry.setSize(Files.size(fullFileNamePath));    // Yes, tar requires that we set the size beforehand..
             taos.putArchiveEntry(entry);
@@ -109,6 +111,9 @@ public class FilesCompressor {
             while ( (readByte = fis.read()) != -1 ) {
                 taos.write(readByte);
             }
+        } catch (NoSuchFileException nsfe) {
+            logger.error("NoSuchFileException: " + nsfe.getMessage());
+            return false;
         } catch (Exception e) {
             logger.error("", e);
             return false;